Create a new GrGLInterface for each GrContext so callback can be used to set GL-context

content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.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.
 
 #if defined(ENABLE_GPU)
 
 #include "content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.h"
 
 #include "gpu/GLES2/gl2.h"
 #ifndef GL_GLEXT_PROTOTYPES
@@ skipping 1015 matching lines @@
   return context_lost_reason_;
 }
 
 void WebGraphicsContext3DCommandBufferImpl::
     setSwapBuffersCompleteCallbackCHROMIUM(
     WebGraphicsContext3D::WebGraphicsSwapBuffersCompleteCallbackCHROMIUM* cb) {
   swapbuffers_complete_callback_ = cb;
 }
 
 #if WEBKIT_USING_SKIA
-GrGLInterface* WebGraphicsContext3DCommandBufferImpl::grGLInterface() {
-  return webkit_glue::GetCommandBufferSkiaGLBinding();
+GrGLInterface* WebGraphicsContext3DCommandBufferImpl::onCreateGrGLInterface() {
+  return webkit_glue::CreateCommandBufferSkiaGLBinding();
 }
 #endif
 
 namespace {
 
 WGC3Denum convertReason(RendererGLContext::ContextLostReason reason) {
   switch (reason) {
   case RendererGLContext::kGuilty:
     return GL_GUILTY_CONTEXT_RESET_ARB;
   case RendererGLContext::kInnocent:
@@ skipping 16 matching lines @@
   }
 #ifndef WTF_USE_THREADED_COMPOSITING
   RenderView* renderview =
       web_view_ ? RenderView::FromWebView(web_view_) : NULL;
   if (renderview)
     renderview->OnViewContextSwapBuffersAborted();
 #endif
 }
 
 #endif  // defined(ENABLE_GPU)