Removed cc::CompositorFrameSink::client_thread_checker_

cc/output/compositor_frame_sink.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 "cc/output/compositor_frame_sink.h"
 
 #include <stdint.h>
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/trace_event/trace_event.h"
 #include "cc/output/compositor_frame_sink_client.h"
 #include "gpu/GLES2/gl2extchromium.h"
 #include "gpu/command_buffer/client/context_support.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 
 namespace cc {
 
 CompositorFrameSink::CompositorFrameSink(
     scoped_refptr<ContextProvider> context_provider,
     scoped_refptr<ContextProvider> worker_context_provider,
     gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
     SharedBitmapManager* shared_bitmap_manager)
     : context_provider_(std::move(context_provider)),
       worker_context_provider_(std::move(worker_context_provider)),
       gpu_memory_buffer_manager_(gpu_memory_buffer_manager),
       shared_bitmap_manager_(shared_bitmap_manager) {
-  client_thread_checker_.DetachFromThread();
 }
 
 CompositorFrameSink::CompositorFrameSink(
     scoped_refptr<VulkanContextProvider> vulkan_context_provider)
     : vulkan_context_provider_(vulkan_context_provider),
       gpu_memory_buffer_manager_(nullptr),
       shared_bitmap_manager_(nullptr) {
-  client_thread_checker_.DetachFromThread();
 }
 
 CompositorFrameSink::~CompositorFrameSink() {
   if (client_)
     DetachFromClient();
 }
 
 bool CompositorFrameSink::BindToClient(CompositorFrameSinkClient* client) {
-  DCHECK(client_thread_checker_.CalledOnValidThread());
   DCHECK(client);
   DCHECK(!client_);
   client_ = client;
   bool success = true;
 
   if (context_provider_.get()) {
     success = context_provider_->BindToCurrentThread();
     if (success) {
       context_provider_->SetLostContextCallback(
           base::Bind(&CompositorFrameSink::DidLoseCompositorFrameSink,
                      base::Unretained(this)));
     }
   }
 
   if (!success) {
     // Destroy the ContextProvider on the thread attempted to be bound.
     context_provider_ = nullptr;
     client_ = nullptr;
   }
 
   return success;
 }
 
 void CompositorFrameSink::DetachFromClient() {
-  DCHECK(client_thread_checker_.CalledOnValidThread());
   DCHECK(client_);
 
   if (context_provider_.get()) {
     context_provider_->SetLostContextCallback(
         ContextProvider::LostContextCallback());
   }
   // Destroy the ContextProvider on the bound thread.
   context_provider_ = nullptr;
   client_ = nullptr;
 }
 
 void CompositorFrameSink::DidLoseCompositorFrameSink() {
   TRACE_EVENT0("cc", "CompositorFrameSink::DidLoseCompositorFrameSink");
   client_->DidLoseCompositorFrameSink();
 }
 
 }  // namespace cc