cc: Introduce BeginFrame sequence numbers and acknowledgements.

cc/surfaces/direct_compositor_frame_sink_unittest.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 "cc/surfaces/direct_compositor_frame_sink.h"
 
 #include <memory>
 
 #include "cc/output/renderer_settings.h"
 #include "cc/output/texture_mailbox_deleter.h"
@@ skipping 29 matching lines @@
 
     std::unique_ptr<FakeOutputSurface> display_output_surface =
         FakeOutputSurface::Create3d();
     display_output_surface_ = display_output_surface.get();
 
     std::unique_ptr<BeginFrameSource> begin_frame_source(
         new BackToBackBeginFrameSource(
             base::MakeUnique<DelayBasedTimeSource>(task_runner_.get())));
 
     int max_frames_pending = 2;
-    std::unique_ptr<DisplayScheduler> scheduler(new DisplayScheduler(
-        begin_frame_source.get(), task_runner_.get(), max_frames_pending));
+    std::unique_ptr<DisplayScheduler> scheduler(
+        new DisplayScheduler(task_runner_.get(), max_frames_pending));
 
     display_.reset(new Display(
         &bitmap_manager_, &gpu_memory_buffer_manager_, RendererSettings(),
         kArbitraryFrameSinkId, std::move(begin_frame_source),
         std::move(display_output_surface), std::move(scheduler),
         base::MakeUnique<TextureMailboxDeleter>(task_runner_.get())));
     compositor_frame_sink_.reset(new DirectCompositorFrameSink(
         kArbitraryFrameSinkId, &surface_manager_, display_.get(),
         context_provider_, nullptr, &gpu_memory_buffer_manager_,
         &bitmap_manager_));
@@ skipping 83 matching lines @@
   EXPECT_EQ(1u, display_output_surface_->num_sent_frames());
 
   SwapBuffersWithDamage(gfx::Rect());
   EXPECT_EQ(1u, display_output_surface_->num_sent_frames());
   task_runner_->RunUntilIdle();
   EXPECT_EQ(1u, display_output_surface_->num_sent_frames());
 }
 
 }  // namespace
 }  // namespace cc