Implement native GMB backbuffers in the GLES2 Command Decoder.

gpu/command_buffer/service/in_process_command_buffer.cc

 // Copyright 2013 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 "gpu/command_buffer/service/in_process_command_buffer.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <queue>
@@ skipping 316 matching lines @@
   bool bind_generates_resource = false;
   scoped_refptr<gles2::FeatureInfo> feature_info =
       new gles2::FeatureInfo(service_->gpu_driver_bug_workarounds());
   decoder_.reset(gles2::GLES2Decoder::Create(
       params.context_group
           ? params.context_group->decoder_->GetContextGroup()
           : new gles2::ContextGroup(
                 service_->gpu_preferences(), service_->mailbox_manager(), NULL,
                 service_->shader_translator_cache(),
                 service_->framebuffer_completeness_cache(), feature_info,
-                bind_generates_resource)));
+                bind_generates_resource, nullptr)));
 
   executor_.reset(new CommandExecutor(command_buffer.get(), decoder_.get(),
                                       decoder_.get()));
   command_buffer->SetGetBufferChangeCallback(base::Bind(
       &CommandExecutor::SetGetBuffer, base::Unretained(executor_.get())));
   command_buffer_ = std::move(command_buffer);
 
   decoder_->set_engine(executor_.get());
 
   if (!surface_.get()) {
@@ skipping 733 matching lines @@
     framebuffer_completeness_cache_ =
         new gpu::gles2::FramebufferCompletenessCache;
   return framebuffer_completeness_cache_;
 }
 
 SyncPointManager* GpuInProcessThread::sync_point_manager() {
   return sync_point_manager_;
 }
 
 }  // namespace gpu