Split the media context from the compositor worker context.

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 732 matching lines @@
       use_software = true;
   }
 
   if (use_software) {
     return base::WrapUnique(new DelegatedCompositorOutputSurface(
         routing_id(), output_surface_id, nullptr, nullptr, nullptr,
         frame_swap_message_queue_));
   }
 
   scoped_refptr<ContextProviderCommandBuffer> worker_context_provider =
-      RenderThreadImpl::current()->SharedWorkerContextProvider();
+      RenderThreadImpl::current()->SharedCompositorWorkerContextProvider();
   if (!worker_context_provider) {
     // Cause the compositor to wait and try again.
     return nullptr;
   }
 
   gpu::SharedMemoryLimits limits;
   // The renderer compositor context doesn't do a lot of stuff, so we don't
   // expect it to need a lot of space for commands or transfer. Raster and
   // uploads happen on the worker context instead.
   limits.command_buffer_size = 64 * 1024;
@@ skipping 1316 matching lines @@
 }
 
 float RenderWidget::GetOriginalDeviceScaleFactor() const {
   return
       screen_metrics_emulator_ ?
       screen_metrics_emulator_->original_screen_info().deviceScaleFactor :
       device_scale_factor_;
 }
 
 }  // namespace content