No bug - Fix typo.

MozReview-Commit-ID: 18W4m40EV7n

dom/canvas/WebGL2ContextFramebuffers.cpp

@@ -89,7 +89,7 @@ WebGL2Context::FramebufferTextureLayer(GLenum target, GLenum attachment,
     }
 
     if (!fb)
-        return ErrorInvalidOperation("%a: Xannot modify framebuffer 0.");
+        return ErrorInvalidOperation("%s: Cannot modify framebuffer 0.", funcName);
 
     fb->FramebufferTextureLayer(funcName, attachment, texture, level, layer);
 }

dom/canvas/WebGLProgram.cpp

@@ -520,7 +520,7 @@ WebGLProgram::BindAttribLocation(GLuint loc, const nsAString& name)
     }
 
     if (StringBeginsWith(name, NS_LITERAL_STRING("gl_"))) {
-        mContext->ErrorInvalidOperation("bindAttribLocation: Can't set the  location of a"
+        mContext->ErrorInvalidOperation("bindAttribLocation: Can't set the location of a"
                                         " name that starts with 'gl_'.");
         return;
     }