cc: Introduce BeginFrame sequence numbers and acknowledgements.

services/ui/surfaces/display_compositor.cc

 // Copyright 2015 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 "services/ui/surfaces/display_compositor.h"
 
 #include <utility>
 
 #include "cc/output/in_process_context_provider.h"
 #include "cc/output/texture_mailbox_deleter.h"
@@ skipping 188 matching lines @@
   } else {
     display_output_surface = base::MakeUnique<DisplayOutputSurface>(
         std::move(context_provider), synthetic_begin_frame_source.get());
   }
 
   int max_frames_pending =
       display_output_surface->capabilities().max_frames_pending;
   DCHECK_GT(max_frames_pending, 0);
 
   std::unique_ptr<cc::DisplayScheduler> scheduler(
-      new cc::DisplayScheduler(synthetic_begin_frame_source.get(),
-                               task_runner_.get(), max_frames_pending));
+      new cc::DisplayScheduler(task_runner_.get(), max_frames_pending));
 
   return base::MakeUnique<cc::Display>(
       nullptr /* bitmap_manager */, gpu_memory_buffer_manager_.get(),
       cc::RendererSettings(), frame_sink_id,
       std::move(synthetic_begin_frame_source),
       std::move(display_output_surface), std::move(scheduler),
       base::MakeUnique<cc::TextureMailboxDeleter>(task_runner_.get()));
 }
 
 const cc::SurfaceId& DisplayCompositor::GetRootSurfaceId() const {
@@ skipping 15 matching lines @@
       surface_id.local_frame_id());
 
   if (client_)
     client_->OnSurfaceCreated(surface_id, frame_size, device_scale_factor);
 }
 
 void DisplayCompositor::OnSurfaceDamaged(const cc::SurfaceId& surface_id,
                                          bool* changed) {}
 
 }  // namespace ui