cc: Make BackToBackBeginFrameSource a SyntheticBeginFrameSource.

components/mus/surfaces/direct_output_surface_ozone.cc

 // Copyright 2016 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 "components/mus/surfaces/direct_output_surface_ozone.h"
 
 #include <utility>
 
 #include "base/bind.h"
+#include "base/memory/ptr_util.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/context_provider.h"
 #include "cc/output/output_surface_client.h"
+#include "cc/scheduler/delay_based_time_source.h"
 #include "components/display_compositor/buffer_queue.h"
 #include "components/mus/common/gpu_service.h"
 #include "components/mus/common/mojo_gpu_memory_buffer_manager.h"
 #include "components/mus/gpu/mus_gpu_memory_buffer_manager.h"
 #include "components/mus/surfaces/surfaces_context_provider.h"
 #include "gpu/command_buffer/client/context_support.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 
 using display_compositor::BufferQueue;
 
 namespace mus {
 
 DirectOutputSurfaceOzone::DirectOutputSurfaceOzone(
     scoped_refptr<SurfacesContextProvider> context_provider,
     gfx::AcceleratedWidget widget,
     base::SingleThreadTaskRunner* task_runner,
     uint32_t target,
     uint32_t internalformat)
     : cc::OutputSurface(context_provider, nullptr, nullptr),
       gl_helper_(context_provider->ContextGL(),
                  context_provider->ContextSupport()),
       synthetic_begin_frame_source_(new cc::SyntheticBeginFrameSource(
-          task_runner,
-          cc::BeginFrameArgs::DefaultInterval())),
+          base::MakeUnique<cc::DelayBasedTimeSource>(task_runner))),
       weak_ptr_factory_(this) {
   if (!GpuService::UseChromeGpuCommandBuffer()) {
     ozone_gpu_memory_buffer_manager_.reset(new OzoneGpuMemoryBufferManager());
     buffer_queue_.reset(new BufferQueue(
         context_provider->ContextGL(), target, internalformat, &gl_helper_,
         ozone_gpu_memory_buffer_manager_.get(), widget));
   } else {
     buffer_queue_.reset(new BufferQueue(
         context_provider->ContextGL(), target, internalformat, &gl_helper_,
         MusGpuMemoryBufferManager::current(), widget));
@@ skipping 107 matching lines @@
 // must create the native window in the size that the hardware reports.
 void DirectOutputSurfaceOzone::Reshape(const gfx::Size& size,
                                        float scale_factor,
                                        bool alpha) {
   OutputSurface::Reshape(size, scale_factor, alpha);
   DCHECK(buffer_queue_);
   buffer_queue_->Reshape(SurfaceSize(), scale_factor);
 }
 
 }  // namespace mus