Allow each WGC3D subclass to determine the correct GrGLInterface for its GrContext.

webkit/glue/gl_bindings_skia_cmd_buffer.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 
 #include "webkit/glue/gl_bindings_skia_cmd_buffer.h"
 
 #ifndef GL_GLEXT_PROTOTYPES
 #define GL_GLEXT_PROTOTYPES
 #endif
 #include "gpu/GLES2/gl2.h"
 #include "gpu/GLES2/gl2ext.h"
 
 #include "third_party/skia/gpu/include/GrGLInterface.h"
 
 namespace webkit_glue {
 
-void BindSkiaToCommandBufferGL() {
+GrGLInterface* GetCommandBufferSkiaGLBinding() {
   static SkAutoTUnref<GrGLInterface> cmd_buffer_interface;
   if (NULL == cmd_buffer_interface.get()) {
     GrGLInterface* interface = new GrGLInterface;
     cmd_buffer_interface.reset(interface);
     interface->fBindingsExported = kES2_GrGLBinding;
     interface->fActiveTexture = glActiveTexture;
     interface->fAttachShader = glAttachShader;
     interface->fBindAttribLocation = glBindAttribLocation;
     interface->fBindBuffer = glBindBuffer;
     interface->fBindTexture = glBindTexture;
@@ skipping 81 matching lines @@
     interface->fGenFramebuffers = glGenFramebuffers;
     interface->fGenRenderbuffers = glGenRenderbuffers;
     interface->fGetFramebufferAttachmentParameteriv =
       glGetFramebufferAttachmentParameteriv;
     interface->fGetRenderbufferParameteriv = glGetRenderbufferParameteriv;
     interface->fRenderbufferStorage = glRenderbufferStorage;
     interface->fRenderbufferStorageMultisample =
       glRenderbufferStorageMultisampleEXT;
     interface->fBlitFramebuffer = glBlitFramebufferEXT;
   }
-  GrGLSetDefaultGLInterface(cmd_buffer_interface.get());
+  return cmd_buffer_interface.get();
 }
 
 }  // namespace webkit_glue