gpu: Refactor GpuMemoryBuffer framework for multi-process support.

cc/resources/resource_provider.cc

 // Copyright 2012 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 "cc/resources/resource_provider.h"
 
 #include <algorithm>
 #include <limits>
 
 #include "base/containers/hash_tables.h"
@@ skipping 1335 matching lines @@
 
   if (resource->type != GLTexture)
     return;
 
   if (resource->image_id)
     return;
 
   resource->allocated = true;
   WebGraphicsContext3D* context3d = output_surface_->context3d();
   DCHECK(context3d);
+  DCHECK_EQ(static_cast<GLenum>(GL_RGBA), resource->format);
   resource->image_id = context3d->createImageCHROMIUM(
       resource->size.width(), resource->size.height(), GL_RGBA8_OES);
   DCHECK(resource->image_id);
 }
 
 void ResourceProvider::ReleaseImage(ResourceId id) {
   DCHECK(thread_checker_.CalledOnValidThread());
   ResourceMap::iterator it = resources_.find(id);
   CHECK(it != resources_.end());
   Resource* resource = &it->second;
@@ skipping 71 matching lines @@
   return stride;
 }
 
 GLint ResourceProvider::GetActiveTextureUnit(WebGraphicsContext3D* context) {
   GLint active_unit = 0;
   context->getIntegerv(GL_ACTIVE_TEXTURE, &active_unit);
   return active_unit;
 }
 
 }  // namespace cc