mus+ash: Enable Chrome HW rendering in mus+ash

content/common/gpu/client/context_provider_command_buffer.cc

 // Copyright (c) 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 "content/common/gpu/client/context_provider_command_buffer.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <set>
@@ skipping 131 matching lines @@
 
     base::AutoLock hold(shared_providers_->lock);
 
     if (!shared_providers_->list.empty()) {
       shared_context_provider = shared_providers_->list.front();
       shared_command_buffer = shared_context_provider->command_buffer_.get();
       share_group = shared_context_provider->gles2_impl_->share_group();
       DCHECK_EQ(!!shared_command_buffer, !!share_group);
     }
 
-    DCHECK(attributes_.buffer_preserved);
-
     // This command buffer is a client-side proxy to the command buffer in the
     // GPU process.
     scoped_refptr<base::SingleThreadTaskRunner> task_runner =
         default_task_runner_;
     if (!task_runner)
       task_runner = base::ThreadTaskRunnerHandle::Get();
     command_buffer_ = gpu::CommandBufferProxyImpl::Create(
         std::move(channel_), surface_handle_, shared_command_buffer, stream_id_,
         stream_priority_, attributes_, active_url_, std::move(task_runner));
     if (!command_buffer_) {
@@ skipping 169 matching lines @@
 
 void ContextProviderCommandBuffer::SetLostContextCallback(
     const LostContextCallback& lost_context_callback) {
   DCHECK(context_thread_checker_.CalledOnValidThread());
   DCHECK(lost_context_callback_.is_null() ||
          lost_context_callback.is_null());
   lost_context_callback_ = lost_context_callback;
 }
 
 }  // namespace content