Adds BeginFrameControl via DevTools.

content/browser/compositor/gpu_process_transport_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 "content/browser/compositor/gpu_process_transport_factory.h"
 
 #include <string>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 531 matching lines @@
   data->begin_frame_source = begin_frame_source.get();
   if (data->reflector)
     data->reflector->OnSourceSurfaceReady(data->display_output_surface);
 
 #if defined(OS_WIN)
   gfx::RenderingWindowManager::GetInstance()->DoSetParentOnChild(
       compositor->widget());
 #endif
 
   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));
 
   // The Display owns and uses the |display_output_surface| created above.
   data->display = base::MakeUnique<cc::Display>(
       HostSharedBitmapManager::current(), GetGpuMemoryBufferManager(),
       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()));
 
@@ skipping 157 matching lines @@
     base::TimeDelta interval) {
   PerCompositorDataMap::iterator it = per_compositor_data_.find(compositor);
   if (it == per_compositor_data_.end())
     return;
   PerCompositorData* data = it->second.get();
   DCHECK(data);
   if (data->begin_frame_source)
     data->begin_frame_source->OnUpdateVSyncParameters(timebase, interval);
 }
 
+void GpuProcessTransportFactory::SwapBeginFrameSource(
+    ui::Compositor* compositor,
+    std::unique_ptr<cc::BeginFrameSource>* begin_frame_source) {
+  PerCompositorDataMap::iterator it = per_compositor_data_.find(compositor);
+  if (it == per_compositor_data_.end())
+    return;
+  PerCompositorData* data = it->second.get();
+  DCHECK(data);
+  if (data->display)
+    data->display->SwapBeginFrameSource(begin_frame_source);
+}
+
 void GpuProcessTransportFactory::SetOutputIsSecure(ui::Compositor* compositor,
                                                    bool secure) {
   PerCompositorDataMap::iterator it = per_compositor_data_.find(compositor);
   if (it == per_compositor_data_.end())
     return;
   PerCompositorData* data = it->second.get();
   DCHECK(data);
   data->output_is_secure = secure;
   if (data->display)
     data->display->SetOutputIsSecure(secure);
@@ skipping 141 matching lines @@
       shared_vulkan_context_provider_ =
           cc::VulkanInProcessContextProvider::Create();
     }
 
     shared_vulkan_context_provider_initialized_ = true;
   }
   return shared_vulkan_context_provider_;
 }
 
 }  // namespace content