Bug 777028 - honor gfx.work-around-driver-bugs for Mesa WebGL workaround - r=jgilbert

content/canvas/src/WebGLContextGL.cpp

@@ -3706,7 +3706,7 @@ WebGLContext::LinkProgram(WebGLProgram *program, ErrorResult& rv)
 
     if (!ValidateObject("linkProgram", program))
         return;
-    
+
     GLuint progname = program->GLName();
 
     if (!program->NextGeneration()) {
@@ -3722,13 +3722,13 @@ WebGLContext::LinkProgram(WebGLProgram *program, ErrorResult& rv)
 
     // bug 777028
     // Mesa can't handle more than 16 samplers per program, counting each array entry.
-    if (mIsMesa) {
-        if (program->UpperBoundNumSamplerUniforms() > 16) {
-            GenerateWarning("Programs with more than 16 samplers are disallowed on Mesa drivers "
-                            "to avoid a Mesa crasher.");
-            program->SetLinkStatus(false);
-            return;
-        }
+    if (gl->WorkAroundDriverBugs() &&
+        mIsMesa &&
+        program->UpperBoundNumSamplerUniforms() > 16)
+    {
+        GenerateWarning("Programs with more than 16 samplers are disallowed on Mesa drivers " "to avoid a Mesa crasher.");
+        program->SetLinkStatus(false);
+        return;
     }
 
     GLint ok;