cc: Add mailbox support to ResourceProvider write locks.

content/renderer/render_widget.cc

 // Copyright (c) 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 "content/renderer/render_widget.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 766 matching lines @@
     // The compositor context shares resources with the worker context unless
     // the worker is async.
     ContextProviderCommandBuffer* share_context = worker_context_provider.get();
     if (compositor_deps_->IsAsyncWorkerContextEnabled())
       share_context = nullptr;
 
     context_provider = new ContextProviderCommandBuffer(
         std::move(gpu_channel_host), gpu::GPU_STREAM_DEFAULT,
         gpu::GpuStreamPriority::NORMAL, gpu::kNullSurfaceHandle,
         GetURLForGraphicsContext3D(), gfx::PreferIntegratedGpu,
-        automatic_flushes, limits, attributes, worker_context_provider.get(),
+        automatic_flushes, limits, attributes, share_context,
         command_buffer_metrics::RENDER_COMPOSITOR_CONTEXT);
 
 #if defined(OS_ANDROID)
     if (RenderThreadImpl::current() &&
         RenderThreadImpl::current()->sync_compositor_message_filter()) {
       uint32_t output_surface_id = next_output_surface_id_++;
       return base::WrapUnique(new SynchronousCompositorOutputSurface(
           context_provider, worker_context_provider, routing_id(),
           output_surface_id,
           RenderThreadImpl::current()->sync_compositor_message_filter(),
@@ skipping 1295 matching lines @@
 }
 
 float RenderWidget::GetOriginalDeviceScaleFactor() const {
   return
       screen_metrics_emulator_ ?
       screen_metrics_emulator_->original_screen_info().deviceScaleFactor :
       device_scale_factor_;
 }
 
 }  // namespace content