cc: Add threaded GPU rasterization.

webkit/common/gpu/context_provider_in_process.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 "webkit/common/gpu/context_provider_in_process.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/strings/stringprintf.h"
 #include "cc/output/managed_memory_policy.h"
@@ skipping 91 matching lines @@
 
   std::string unique_context_name =
       base::StringPrintf("%s-%p", debug_name_.c_str(), context3d_.get());
   context3d_->traceBeginCHROMIUM("gpu_toplevel",
                                  unique_context_name.c_str());
 
   lost_context_callback_proxy_.reset(new LostContextCallbackProxy(this));
   return true;
 }
 
+void ContextProviderInProcess::DetachFromThread() {

[vmiura, 2015/02/13 22:06:43]

Added this.

+  context_thread_checker_.DetachFromThread();
+}
+
 void ContextProviderInProcess::InitializeCapabilities() {
   capabilities_.gpu = context3d_->GetImplementation()->capabilities();
 
   size_t mapped_memory_limit = context3d_->GetMappedMemoryLimit();
   capabilities_.max_transfer_buffer_usage_bytes =
       mapped_memory_limit ==
               WebGraphicsContext3DInProcessCommandBufferImpl::kNoLimit
           ? std::numeric_limits<size_t>::max()
           : mapped_memory_limit;
 }
@@ skipping 92 matching lines @@
   lost_context_callback_ = lost_context_callback;
 }
 
 void ContextProviderInProcess::SetMemoryPolicyChangedCallback(
     const MemoryPolicyChangedCallback& memory_policy_changed_callback) {
   // There's no memory manager for the in-process implementation.
 }
 
 }  // namespace gpu
 }  // namespace webkit