(not for commit) Create 2nd ContextProvider for Ganesh rasterization.

content/renderer/gpu/compositor_output_surface.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/gpu/compositor_output_surface.h"
 
 #include "base/command_line.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
@@ skipping 15 matching lines @@
 // compositor thread, so we use a simple int here to track prefer-smoothness.
 int g_prefer_smoothness_count = 0;
 } // namespace
 
 namespace content {
 
 CompositorOutputSurface::CompositorOutputSurface(
     int32 routing_id,
     uint32 output_surface_id,
     const scoped_refptr<ContextProviderCommandBuffer>& context_provider,
+    const scoped_refptr<ContextProviderCommandBuffer>& worker_context_provider,
     scoped_ptr<cc::SoftwareOutputDevice> software_device,
     scoped_refptr<FrameSwapMessageQueue> swap_frame_message_queue,
     bool use_swap_compositor_frame_message)
-    : OutputSurface(context_provider, software_device.Pass()),
+    : OutputSurface(context_provider,
+                    worker_context_provider,
+                    software_device.Pass()),
       output_surface_id_(output_surface_id),
       use_swap_compositor_frame_message_(use_swap_compositor_frame_message),
       output_surface_filter_(
           RenderThreadImpl::current()->compositor_message_filter()),
       frame_swap_message_queue_(swap_frame_message_queue),
       routing_id_(routing_id),
       prefers_smoothness_(false),
 #if defined(OS_WIN)
       // TODO(epenner): Implement PlatformThread::CurrentHandle() on windows.
       main_thread_handle_(base::PlatformThreadHandle()),
@@ skipping 194 matching lines @@
   // If this is the last surface to stop preferring smoothness,
   // Reset the main thread's priority to the default.
   if (prefers_smoothness_ == true &&
       --g_prefer_smoothness_count == 0) {
     SetThreadPriorityToDefault(main_thread_handle_);
   }
   prefers_smoothness_ = prefers_smoothness;
 }
 
 }  // namespace content