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

content/renderer/gpu/mailbox_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/mailbox_output_surface.h"
 
 #include "base/logging.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
 #include "cc/output/gl_frame_data.h"
 #include "cc/resources/resource_provider.h"
 #include "content/renderer/gpu/frame_swap_message_queue.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "third_party/khronos/GLES2/gl2.h"
 #include "third_party/khronos/GLES2/gl2ext.h"
 
 using cc::CompositorFrame;
 using cc::GLFrameData;
 using cc::ResourceProvider;
 using gpu::Mailbox;
 using gpu::gles2::GLES2Interface;
 
 namespace content {
 
 MailboxOutputSurface::MailboxOutputSurface(
     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,
     cc::ResourceFormat format)
     : CompositorOutputSurface(routing_id,
                               output_surface_id,
                               context_provider,
+                              worker_context_provider,
                               software_device.Pass(),
                               swap_frame_message_queue,
                               true),
       fbo_(0),
       is_backbuffer_discarded_(false),
       format_(format) {
   pending_textures_.push_back(TransferableFrame());
   capabilities_.max_frames_pending = 1;
   capabilities_.uses_default_gl_framebuffer = false;
 }
@@ skipping 164 matching lines @@
   pending_textures_.push_back(current_backing_);
   current_backing_ = TransferableFrame();
 }
 
 size_t MailboxOutputSurface::GetNumAcksPending() {
   DCHECK(pending_textures_.size());
   return pending_textures_.size() - 1;
 }
 
 }  // namespace content