diff --git a/src/libANGLE/Context.cpp b/src/libANGLE/Context.cpp
index b102bb543..b22dabe52 100644
--- a/src/libANGLE/Context.cpp
+++ b/src/libANGLE/Context.cpp
@@ -630,11 +630,14 @@ GLuint Context::createFramebuffer()
     return mState.mFramebuffers->createFramebuffer();
 }
 
-GLuint Context::createFenceNV()
+void Context::genFencesNV(GLsizei n, GLuint *fences)
 {
-    GLuint handle = mFenceNVHandleAllocator.allocate();
-    mFenceNVMap.assign(handle, new FenceNV(mImplementation->createFenceNV()));
-    return handle;
+    for (int i = 0; i < n; i++)
+    {
+        GLuint handle = mFenceNVHandleAllocator.allocate();
+        mFenceNVMap.assign(handle, new FenceNV(mImplementation->createFenceNV()));
+        fences[i] = handle;
+    }
 }
 
 GLuint Context::createProgramPipeline()
@@ -807,13 +810,18 @@ void Context::deleteFramebuffer(GLuint framebuffer)
     mState.mFramebuffers->deleteObject(this, framebuffer);
 }
 
-void Context::deleteFenceNV(GLuint fence)
+void Context::deleteFencesNV(GLsizei n, const GLuint *fences)
 {
-    FenceNV *fenceObject = nullptr;
-    if (mFenceNVMap.erase(fence, &fenceObject))
+    for (int i = 0; i < n; i++)
     {
-        mFenceNVHandleAllocator.release(fence);
-        delete fenceObject;
+        GLuint fence = fences[i];
+
+        FenceNV *fenceObject = nullptr;
+        if (mFenceNVMap.erase(fence, &fenceObject))
+        {
+            mFenceNVHandleAllocator.release(fence);
+            delete fenceObject;
+        }
     }
 }
 
@@ -5645,4 +5653,99 @@ GLboolean Context::isProgramPipeline(GLuint pipeline)
     return (getProgramPipeline(pipeline) ? GL_TRUE : GL_FALSE);
 }
 
+void Context::finishFenceNV(GLuint fence)
+{
+    FenceNV *fenceObject = getFenceNV(fence);
+
+    ASSERT(fenceObject && fenceObject->isSet());
+    handleError(fenceObject->finish());
+}
+
+void Context::getFenceivNV(GLuint fence, GLenum pname, GLint *params)
+{
+    FenceNV *fenceObject = getFenceNV(fence);
+
+    ASSERT(fenceObject && fenceObject->isSet());
+
+    switch (pname)
+    {
+        case GL_FENCE_STATUS_NV:
+        {
+            // GL_NV_fence spec:
+            // Once the status of a fence has been finished (via FinishFenceNV) or tested and
+            // the returned status is TRUE (via either TestFenceNV or GetFenceivNV querying the
+            // FENCE_STATUS_NV), the status remains TRUE until the next SetFenceNV of the fence.
+            GLboolean status = GL_TRUE;
+            if (fenceObject->getStatus() != GL_TRUE)
+            {
+                ANGLE_CONTEXT_TRY(fenceObject->test(&status));
+            }
+            *params = status;
+            break;
+        }
+
+        case GL_FENCE_CONDITION_NV:
+        {
+            *params = static_cast<GLint>(fenceObject->getCondition());
+            break;
+        }
+
+        default:
+            UNREACHABLE();
+    }
+}
+
+void Context::getTranslatedShaderSource(GLuint shader,
+                                        GLsizei bufsize,
+                                        GLsizei *length,
+                                        GLchar *source)
+{
+    Shader *shaderObject = getShader(shader);
+    ASSERT(shaderObject);
+    shaderObject->getTranslatedSourceWithDebugInfo(this, bufsize, length, source);
+}
+
+void Context::getnUniformfv(GLuint program, GLint location, GLsizei bufSize, GLfloat *params)
+{
+    Program *programObject = getProgram(program);
+    ASSERT(programObject);
+
+    programObject->getUniformfv(this, location, params);
+}
+
+void Context::getnUniformiv(GLuint program, GLint location, GLsizei bufSize, GLint *params)
+{
+    Program *programObject = getProgram(program);
+    ASSERT(programObject);
+
+    programObject->getUniformiv(this, location, params);
+}
+
+GLboolean Context::isFenceNV(GLuint fence)
+{
+    FenceNV *fenceObject = getFenceNV(fence);
+
+    if (fenceObject == nullptr)
+    {
+        return GL_FALSE;
+    }
+
+    // GL_NV_fence spec:
+    // A name returned by GenFencesNV, but not yet set via SetFenceNV, is not the name of an
+    // existing fence.
+    return fenceObject->isSet();
+}
+
+void Context::readnPixels(GLint x,
+                          GLint y,
+                          GLsizei width,
+                          GLsizei height,
+                          GLenum format,
+                          GLenum type,
+                          GLsizei bufSize,
+                          void *data)
+{
+    return readPixels(x, y, width, height, format, type, data);
+}
+
 }  // namespace gl
diff --git a/src/libANGLE/Context.h b/src/libANGLE/Context.h
index 7aef48d61..b383faccc 100644
--- a/src/libANGLE/Context.h
+++ b/src/libANGLE/Context.h
@@ -115,8 +115,11 @@ class Context final : public ValidationContext
     void deleteFramebuffer(GLuint framebuffer);
 
     // NV Fences are owned by the Context.
-    GLuint createFenceNV();
-    void deleteFenceNV(GLuint fence);
+    void genFencesNV(GLsizei n, GLuint *fences);
+    void deleteFencesNV(GLsizei n, const GLuint *fences);
+    void finishFenceNV(GLuint fence);
+    void getFenceivNV(GLuint fence, GLenum pname, GLint *params);
+    GLboolean isFenceNV(GLuint fence);
 
     void bindTexture(GLenum target, GLuint handle);
     void bindReadFramebuffer(GLuint framebufferHandle);
@@ -965,6 +968,18 @@ class Context final : public ValidationContext
     void genProgramPipelines(GLsizei n, GLuint *pipelines);
     GLboolean isProgramPipeline(GLuint pipeline);
 
+    void getTranslatedShaderSource(GLuint shader, GLsizei bufsize, GLsizei *length, GLchar *source);
+    void getnUniformfv(GLuint program, GLint location, GLsizei bufSize, GLfloat *params);
+    void getnUniformiv(GLuint program, GLint location, GLsizei bufSize, GLint *params);
+    void readnPixels(GLint x,
+                     GLint y,
+                     GLsizei width,
+                     GLsizei height,
+                     GLenum format,
+                     GLenum type,
+                     GLsizei bufSize,
+                     void *data);
+
     // Consumes the error.
     void handleError(const Error &error) override;
 
diff --git a/src/libANGLE/ErrorStrings.h b/src/libANGLE/ErrorStrings.h
index bf71b9932..78023e594 100644
--- a/src/libANGLE/ErrorStrings.h
+++ b/src/libANGLE/ErrorStrings.h
@@ -67,6 +67,8 @@ ERRMSG(InvalidDepthRange, "Near value cannot be greater than far.");
 ERRMSG(InvalidDrawMode, "Invalid draw mode.");
 ERRMSG(InvalidDrawModeTransformFeedback,
        "Draw mode must match current transform feedback object's draw mode.");
+ERRMSG(InvalidFence, "Invalid fence object.");
+ERRMSG(InvalidFenceState, "Fence must be set.");
 ERRMSG(InvalidFillMode, "Invalid fill mode.");
 ERRMSG(InvalidFilterTexture, "Texture only supports NEAREST and LINEAR filtering.");
 ERRMSG(InvalidFormat, "Invalid format.");
@@ -135,6 +137,7 @@ ERRMSG(NoSuchPath, "No such path object.");
 ERRMSG(NoTransformFeedbackOutputVariables,
     "The active program has specified no output variables to record.");
 ERRMSG(NoZeroDivisor, "At least one enabled attribute must have a divisor of zero.");
+ERRMSG(NVFenceNotSupported, "GL_NV_fence is not supported");
 ERRMSG(ObjectNotGenerated, "Object cannot be used because it has not been generated.");
 ERRMSG(OffsetMustBeMultipleOfType, "Offset must be a multiple of the passed in datatype.");
 ERRMSG(OffsetMustBeMultipleOfUint,
diff --git a/src/libANGLE/validationES2.cpp b/src/libANGLE/validationES2.cpp
index 001c91add..362b9dac2 100644
--- a/src/libANGLE/validationES2.cpp
+++ b/src/libANGLE/validationES2.cpp
@@ -15,6 +15,7 @@
 #include "common/utilities.h"
 #include "libANGLE/Context.h"
 #include "libANGLE/ErrorStrings.h"
+#include "libANGLE/Fence.h"
 #include "libANGLE/Framebuffer.h"
 #include "libANGLE/FramebufferAttachment.h"
 #include "libANGLE/Renderbuffer.h"
@@ -6348,4 +6349,150 @@ bool ValidateUseProgram(Context *context, GLuint program)
     return true;
 }
 
+bool ValidateDeleteFencesNV(Context *context, GLsizei n, const GLuint *fences)
+{
+    if (!context->getExtensions().fence)
+    {
+        ANGLE_VALIDATION_ERR(context, InvalidOperation(), NVFenceNotSupported);
+        return false;
+    }
+
+    if (n < 0)
+    {
+        ANGLE_VALIDATION_ERR(context, InvalidValue(), NegativeCount);
+        return false;
+    }
+
+    return true;
+}
+
+bool ValidateFinishFenceNV(Context *context, GLuint fence)
+{
+    if (!context->getExtensions().fence)
+    {
+        ANGLE_VALIDATION_ERR(context, InvalidOperation(), NVFenceNotSupported);
+        return false;
+    }
+
+    FenceNV *fenceObject = context->getFenceNV(fence);
+
+    if (fenceObject == nullptr)
+    {
+        ANGLE_VALIDATION_ERR(context, InvalidOperation(), InvalidFence);
+        return false;
+    }
+
+    if (!fenceObject->isSet())
+    {
+        ANGLE_VALIDATION_ERR(context, InvalidOperation(), InvalidFenceState);
+        return false;
+    }
+
+    return true;
+}
+
+bool ValidateGenFencesNV(Context *context, GLsizei n, GLuint *fences)
+{
+    if (!context->getExtensions().fence)
+    {
+        ANGLE_VALIDATION_ERR(context, InvalidOperation(), NVFenceNotSupported);
+        return false;
+    }
+
+    if (n < 0)
+    {
+        ANGLE_VALIDATION_ERR(context, InvalidValue(), NegativeCount);
+        return false;
+    }
+
+    return true;
+}
+
+bool ValidateGetFenceivNV(Context *context, GLuint fence, GLenum pname, GLint *params)
+{
+    if (!context->getExtensions().fence)
+    {
+        ANGLE_VALIDATION_ERR(context, InvalidOperation(), NVFenceNotSupported);
+        return false;
+    }
+
+    FenceNV *fenceObject = context->getFenceNV(fence);
+
+    if (fenceObject == nullptr)
+    {
+        ANGLE_VALIDATION_ERR(context, InvalidOperation(), InvalidFence);
+        return false;
+    }
+
+    if (!fenceObject->isSet())
+    {
+        ANGLE_VALIDATION_ERR(context, InvalidOperation(), InvalidFenceState);
+        return false;
+    }
+
+    switch (pname)
+    {
+        case GL_FENCE_STATUS_NV:
+        case GL_FENCE_CONDITION_NV:
+            break;
+
+        default:
+            ANGLE_VALIDATION_ERR(context, InvalidEnum(), InvalidPname);
+            return false;
+    }
+
+    return true;
+}
+
+bool ValidateGetGraphicsResetStatusEXT(Context *context)
+{
+    if (!context->getExtensions().robustness)
+    {
+        ANGLE_VALIDATION_ERR(context, InvalidOperation(), ExtensionNotEnabled);
+        return false;
+    }
+
+    return true;
+}
+
+bool ValidateGetTranslatedShaderSourceANGLE(Context *context,
+                                            GLuint shader,
+                                            GLsizei bufsize,
+                                            GLsizei *length,
+                                            GLchar *source)
+{
+    if (!context->getExtensions().translatedShaderSource)
+    {
+        ANGLE_VALIDATION_ERR(context, InvalidOperation(), ExtensionNotEnabled);
+        return false;
+    }
+
+    if (bufsize < 0)
+    {
+        context->handleError(InvalidValue());
+        return false;
+    }
+
+    Shader *shaderObject = context->getShader(shader);
+
+    if (!shaderObject)
+    {
+        context->handleError(InvalidOperation());
+        return false;
+    }
+
+    return true;
+}
+
+bool ValidateIsFenceNV(Context *context, GLuint fence)
+{
+    if (!context->getExtensions().fence)
+    {
+        ANGLE_VALIDATION_ERR(context, InvalidOperation(), NVFenceNotSupported);
+        return false;
+    }
+
+    return true;
+}
+
 }  // namespace gl
diff --git a/src/libANGLE/validationES2.h b/src/libANGLE/validationES2.h
index af995aee1..6a02af32d 100644
--- a/src/libANGLE/validationES2.h
+++ b/src/libANGLE/validationES2.h
@@ -682,6 +682,19 @@ bool ValidateUniform1iv(ValidationContext *context,
                         const GLint *value);
 bool ValidateUseProgram(Context *context, GLuint program);
 
+// Extension validation
+bool ValidateDeleteFencesNV(Context *context, GLsizei n, const GLuint *fences);
+bool ValidateFinishFenceNV(Context *context, GLuint fence);
+bool ValidateGenFencesNV(Context *context, GLsizei n, GLuint *fences);
+bool ValidateGetFenceivNV(Context *context, GLuint fence, GLenum pname, GLint *params);
+bool ValidateGetGraphicsResetStatusEXT(Context *context);
+bool ValidateGetTranslatedShaderSourceANGLE(Context *context,
+                                            GLuint shader,
+                                            GLsizei bufsize,
+                                            GLsizei *length,
+                                            GLchar *source);
+bool ValidateIsFenceNV(Context *context, GLuint fence);
+
 }  // namespace gl
 
 #endif  // LIBANGLE_VALIDATION_ES2_H_
diff --git a/src/libGLESv2/entry_points_gles_2_0_ext.cpp b/src/libGLESv2/entry_points_gles_2_0_ext.cpp
index ed55e6495..122052f76 100644
--- a/src/libGLESv2/entry_points_gles_2_0_ext.cpp
+++ b/src/libGLESv2/entry_points_gles_2_0_ext.cpp
@@ -152,7 +152,7 @@ void GL_APIENTRY GetQueryivEXT(GLenum target, GLenum pname, GLint *params)
     Context *context = GetValidGlobalContext();
     if (context)
     {
-        if (!ValidateGetQueryivEXT(context, target, pname, params))
+        if (!context->skipValidation() && !ValidateGetQueryivEXT(context, target, pname, params))
         {
             return;
         }
@@ -168,7 +168,7 @@ void GL_APIENTRY GetQueryObjectivEXT(GLuint id, GLenum pname, GLint *params)
     Context *context = GetValidGlobalContext();
     if (context)
     {
-        if (!ValidateGetQueryObjectivEXT(context, id, pname, params))
+        if (!context->skipValidation() && !ValidateGetQueryObjectivEXT(context, id, pname, params))
         {
             return;
         }
@@ -184,7 +184,7 @@ void GL_APIENTRY GetQueryObjectuivEXT(GLuint id, GLenum pname, GLuint *params)
     Context *context = GetValidGlobalContext();
     if (context)
     {
-        if (!ValidateGetQueryObjectuivEXT(context, id, pname, params))
+        if (!context->skipValidation() && !ValidateGetQueryObjectuivEXT(context, id, pname, params))
         {
             return;
         }
@@ -200,7 +200,8 @@ void GL_APIENTRY GetQueryObjecti64vEXT(GLuint id, GLenum pname, GLint64 *params)
     Context *context = GetValidGlobalContext();
     if (context)
     {
-        if (!ValidateGetQueryObjecti64vEXT(context, id, pname, params))
+        if (!context->skipValidation() &&
+            !ValidateGetQueryObjecti64vEXT(context, id, pname, params))
         {
             return;
         }
@@ -216,7 +217,8 @@ void GL_APIENTRY GetQueryObjectui64vEXT(GLuint id, GLenum pname, GLuint64 *param
     Context *context = GetValidGlobalContext();
     if (context)
     {
-        if (!ValidateGetQueryObjectui64vEXT(context, id, pname, params))
+        if (!context->skipValidation() &&
+            !ValidateGetQueryObjectui64vEXT(context, id, pname, params))
         {
             return;
         }
@@ -232,16 +234,12 @@ void GL_APIENTRY DeleteFencesNV(GLsizei n, const GLuint *fences)
     Context *context = GetValidGlobalContext();
     if (context)
     {
-        if (n < 0)
+        if (!context->skipValidation() && !ValidateDeleteFencesNV(context, n, fences))
         {
-            context->handleError(InvalidValue());
             return;
         }
 
-        for (int i = 0; i < n; i++)
-        {
-            context->deleteFenceNV(fences[i]);
-        }
+        context->deleteFencesNV(n, fences);
     }
 }
 
@@ -256,7 +254,8 @@ void GL_APIENTRY DrawArraysInstancedANGLE(GLenum mode,
     Context *context = GetValidGlobalContext();
     if (context)
     {
-        if (!ValidateDrawArraysInstancedANGLE(context, mode, first, count, primcount))
+        if (!context->skipValidation() &&
+            !ValidateDrawArraysInstancedANGLE(context, mode, first, count, primcount))
         {
             return;
         }
@@ -299,21 +298,12 @@ void GL_APIENTRY FinishFenceNV(GLuint fence)
     Context *context = GetValidGlobalContext();
     if (context)
     {
-        FenceNV *fenceObject = context->getFenceNV(fence);
-
-        if (fenceObject == nullptr)
+        if (!context->skipValidation() && !ValidateFinishFenceNV(context, fence))
         {
-            context->handleError(InvalidOperation());
             return;
         }
 
-        if (fenceObject->isSet() != GL_TRUE)
-        {
-            context->handleError(InvalidOperation());
-            return;
-        }
-
-        context->handleError(fenceObject->finish());
+        context->finishFenceNV(fence);
     }
 }
 
@@ -324,16 +314,12 @@ void GL_APIENTRY GenFencesNV(GLsizei n, GLuint *fences)
     Context *context = GetValidGlobalContext();
     if (context)
     {
-        if (n < 0)
+        if (!context->skipValidation() && !ValidateGenFencesNV(context, n, fences))
         {
-            context->handleError(InvalidValue());
             return;
         }
 
-        for (int i = 0; i < n; i++)
-        {
-            fences[i] = context->createFenceNV();
-        }
+        context->genFencesNV(n, fences);
     }
 }
 
@@ -345,58 +331,16 @@ void GL_APIENTRY GetFenceivNV(GLuint fence, GLenum pname, GLint *params)
     Context *context = GetValidGlobalContext();
     if (context)
     {
-        FenceNV *fenceObject = context->getFenceNV(fence);
-
-        if (fenceObject == nullptr)
+        if (!context->skipValidation() && !ValidateGetFenceivNV(context, fence, pname, params))
         {
-            context->handleError(InvalidOperation());
             return;
         }
 
-        if (fenceObject->isSet() != GL_TRUE)
-        {
-            context->handleError(InvalidOperation());
-            return;
-        }
-
-        switch (pname)
-        {
-            case GL_FENCE_STATUS_NV:
-            {
-                // GL_NV_fence spec:
-                // Once the status of a fence has been finished (via FinishFenceNV) or tested and
-                // the returned status is TRUE (via either TestFenceNV or GetFenceivNV querying the
-                // FENCE_STATUS_NV), the status remains TRUE until the next SetFenceNV of the fence.
-                GLboolean status = GL_TRUE;
-                if (fenceObject->getStatus() != GL_TRUE)
-                {
-                    Error error = fenceObject->test(&status);
-                    if (error.isError())
-                    {
-                        context->handleError(error);
-                        return;
-                    }
-                }
-                *params = status;
-                break;
-            }
-
-            case GL_FENCE_CONDITION_NV:
-            {
-                *params = static_cast<GLint>(fenceObject->getCondition());
-                break;
-            }
-
-            default:
-            {
-                context->handleError(InvalidEnum());
-                return;
-            }
-        }
+        context->getFenceivNV(fence, pname, params);
     }
 }
 
-GLenum GL_APIENTRY GetGraphicsResetStatusEXT(void)
+GLenum GL_APIENTRY GetGraphicsResetStatusEXT()
 {
     EVENT("()");
 
@@ -404,6 +348,11 @@ GLenum GL_APIENTRY GetGraphicsResetStatusEXT(void)
 
     if (context)
     {
+        if (!context->skipValidation() && !ValidateGetGraphicsResetStatusEXT(context))
+        {
+            return GL_NO_ERROR;
+        }
+
         return context->getResetStatus();
     }
 
@@ -423,21 +372,13 @@ void GL_APIENTRY GetTranslatedShaderSourceANGLE(GLuint shader,
     Context *context = GetValidGlobalContext();
     if (context)
     {
-        if (bufsize < 0)
+        if (!context->skipValidation() &&
+            !ValidateGetTranslatedShaderSourceANGLE(context, shader, bufsize, length, source))
         {
-            context->handleError(InvalidValue());
             return;
         }
 
-        Shader *shaderObject = context->getShader(shader);
-
-        if (!shaderObject)
-        {
-            context->handleError(InvalidOperation());
-            return;
-        }
-
-        shaderObject->getTranslatedSourceWithDebugInfo(context, bufsize, length, source);
+        context->getTranslatedShaderSource(shader, bufsize, length, source);
     }
 }
 
@@ -451,15 +392,13 @@ void GL_APIENTRY GetnUniformfvEXT(GLuint program, GLint location, GLsizei bufSiz
     Context *context = GetValidGlobalContext();
     if (context)
     {
-        if (!ValidateGetnUniformfvEXT(context, program, location, bufSize, params))
+        if (!context->skipValidation() &&
+            !ValidateGetnUniformfvEXT(context, program, location, bufSize, params))
         {
             return;
         }
 
-        Program *programObject = context->getProgram(program);
-        ASSERT(programObject);
-
-        programObject->getUniformfv(context, location, params);
+        context->getnUniformfv(program, location, bufSize, params);
     }
 }
 
@@ -472,15 +411,13 @@ void GL_APIENTRY GetnUniformivEXT(GLuint program, GLint location, GLsizei bufSiz
     Context *context = GetValidGlobalContext();
     if (context)
     {
-        if (!ValidateGetnUniformivEXT(context, program, location, bufSize, params))
+        if (!context->skipValidation() &&
+            !ValidateGetnUniformivEXT(context, program, location, bufSize, params))
         {
             return;
         }
 
-        Program *programObject = context->getProgram(program);
-        ASSERT(programObject);
-
-        programObject->getUniformiv(context, location, params);
+        context->getnUniformiv(program, location, bufSize, params);
     }
 }
 
@@ -491,17 +428,12 @@ GLboolean GL_APIENTRY IsFenceNV(GLuint fence)
     Context *context = GetValidGlobalContext();
     if (context)
     {
-        FenceNV *fenceObject = context->getFenceNV(fence);
-
-        if (fenceObject == nullptr)
+        if (!context->skipValidation() && !ValidateIsFenceNV(context, fence))
         {
             return GL_FALSE;
         }
 
-        // GL_NV_fence spec:
-        // A name returned by GenFencesNV, but not yet set via SetFenceNV, is not the name of an
-        // existing fence.
-        return fenceObject->isSet();
+        return context->isFenceNV(fence);
     }
 
     return GL_FALSE;
@@ -530,7 +462,7 @@ void GL_APIENTRY ReadnPixelsEXT(GLint x,
             return;
         }
 
-        context->readPixels(x, y, width, height, format, type, data);
+        context->readnPixels(x, y, width, height, format, type, bufSize, data);
     }
 }