Added support for Chrome's gpu command buffer extension BindUniformLocation.

include/gpu/gl/GrGLInterface.h

Index: include/gpu/gl/GrGLInterface.h
diff --git a/include/gpu/gl/GrGLInterface.h b/include/gpu/gl/GrGLInterface.h
index 44a9c7ca2a3a87c9421a60f73f73c5ee2e28e7d9..30690b99eb006afe51d3042d8428f93c82510702 100644
--- a/include/gpu/gl/GrGLInterface.h
+++ b/include/gpu/gl/GrGLInterface.h
@@ -252,6 +252,9 @@ public:
     //  the standard function in ES3+ or GL 3.0+.
     GLPtr<GrGLRenderbufferStorageMultisampleProc> fRenderbufferStorageMultisample;
 
+    // Pointer to BindUniformLocationCHROMIUM from the GL_CHROMIUM_bind_uniform_location extension.
+    GLPtr<GrGLBindUniformLocation> fBindUniformLocation;
+
     GLPtr<GrGLResolveMultisampleFramebufferProc> fResolveMultisampleFramebuffer;
     GLPtr<GrGLScissorProc> fScissor;
     GLPtr<GrGLShaderSourceProc> fShaderSource;