Hook up ui::Compositor to Display's BeginFrameSource

cc/surfaces/onscreen_display_client.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 "cc/surfaces/onscreen_display_client.h"
 
 #include "base/trace_event/trace_event.h"
 #include "cc/output/output_surface.h"
 #include "cc/scheduler/begin_frame_source.h"
 #include "cc/surfaces/display_scheduler.h"
@@ skipping 10 matching lines @@
     gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
     const RendererSettings& settings,
     scoped_refptr<base::SingleThreadTaskRunner> task_runner)
     : output_surface_(std::move(output_surface)),
       task_runner_(task_runner),
       display_(new Display(this,
                            manager,
                            bitmap_manager,
                            gpu_memory_buffer_manager,
                            settings)),
-      output_surface_lost_(false),
-      disable_display_vsync_(settings.disable_display_vsync) {}
+      output_surface_lost_(false) {}
 
 OnscreenDisplayClient::~OnscreenDisplayClient() {
 }
 
 bool OnscreenDisplayClient::Initialize() {
   DCHECK(output_surface_);
-
-  BeginFrameSource* frame_source;
-  if (disable_display_vsync_) {
-    unthrottled_frame_source_ =
-        BackToBackBeginFrameSource::Create(task_runner_.get());
-    frame_source = unthrottled_frame_source_.get();
-  } else {
-    synthetic_frame_source_ = SyntheticBeginFrameSource::Create(
-        task_runner_.get(), BeginFrameArgs::DefaultInterval());
-    frame_source = synthetic_frame_source_.get();
-  }
-
-  scheduler_.reset(
-      new DisplayScheduler(display_.get(), frame_source, task_runner_.get(),
-                           output_surface_->capabilities().max_frames_pending));
-
-  return display_->Initialize(std::move(output_surface_), scheduler_.get());
-}
-
-void OnscreenDisplayClient::CommitVSyncParameters(base::TimeTicks timebase,
-                                                  base::TimeDelta interval) {
-  if (interval == base::TimeDelta()) {
-    // TODO(brianderson): We should not be receiving 0 intervals.
-    interval = BeginFrameArgs::DefaultInterval();
-  }
-
-  surface_display_output_surface_->ReceivedVSyncParameters(timebase, interval);
-  if (synthetic_frame_source_.get())
-    synthetic_frame_source_->OnUpdateVSyncParameters(timebase, interval);
+  return display_->Initialize(std::move(output_surface_), task_runner_.get());
 }
 
 void OnscreenDisplayClient::OutputSurfaceLost() {
   output_surface_lost_ = true;
   surface_display_output_surface_->DidLoseOutputSurface();
 }
 
 void OnscreenDisplayClient::SetMemoryPolicy(const ManagedMemoryPolicy& policy) {
   surface_display_output_surface_->SetMemoryPolicy(policy);
 }
 
 }  // namespace cc