cc: Introduce BeginFrame sequence numbers and acknowledgements.

ui/compositor/test/in_process_context_factory.cc

 // Copyright 2014 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 "ui/compositor/test/in_process_context_factory.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 182 matching lines @@
   } else {
     display_output_surface =
         base::MakeUnique<DirectOutputSurface>(context_provider);
   }
 
   std::unique_ptr<cc::DelayBasedBeginFrameSource> begin_frame_source(
       new cc::DelayBasedBeginFrameSource(
           base::MakeUnique<cc::DelayBasedTimeSource>(
               compositor->task_runner().get())));
   std::unique_ptr<cc::DisplayScheduler> scheduler(new cc::DisplayScheduler(
-      begin_frame_source.get(), compositor->task_runner().get(),
+      compositor->task_runner().get(),
       display_output_surface->capabilities().max_frames_pending));
 
   data->display = base::MakeUnique<cc::Display>(
       &shared_bitmap_manager_, &gpu_memory_buffer_manager_,
       compositor->GetRendererSettings(), compositor->frame_sink_id(),
       std::move(begin_frame_source), std::move(display_output_surface),
       std::move(scheduler), base::MakeUnique<cc::TextureMailboxDeleter>(
                                 compositor->task_runner().get()));
 
   auto* display = per_compositor_data_[compositor.get()]->display.get();
@@ skipping 108 matching lines @@
     data->surface_handle = tracker->AddSurfaceForNativeWidget(widget);
 #endif
   }
 
   PerCompositorData* return_ptr = data.get();
   per_compositor_data_[compositor] = std::move(data);
   return return_ptr;
 }
 
 }  // namespace ui