Decouple BrowserCompositorOutputSurface from BeginFrameSource.

components/exo/wayland/server.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 "components/exo/wayland/server.h"
 
 #include <grp.h>
 #include <linux/input.h>
 #include <stddef.h>
 #include <stdint.h>
@@ skipping 1842 matching lines @@
   SetImplementation(resource, &remote_shell_implementation,
                     base::MakeUnique<WaylandRemoteShell>(
                         static_cast<Display*>(data), resource));
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // vsync_timing_interface:
 
 // Implements VSync timing interface by monitoring a compositor for updates
 // to VSync parameters.
-class VSyncTiming : public ui::CompositorVSyncManager::Observer {
+class VSyncTiming : public cc::VSyncObserver {
  public:
   ~VSyncTiming() { vsync_manager_->RemoveObserver(this); }
 
   static std::unique_ptr<VSyncTiming> Create(ui::Compositor* compositor,
                                              wl_resource* timing_resource) {
     std::unique_ptr<VSyncTiming> vsync_timing(
         new VSyncTiming(compositor, timing_resource));
     // Note: AddObserver() will call OnUpdateVSyncParameters.
     vsync_timing->vsync_manager_->AddObserver(vsync_timing.get());
     return vsync_timing;
   }
 
-  // Overridden from ui::CompositorVSyncManager::Observer:
+  // Overridden from cc::VSyncObserver:
   void OnUpdateVSyncParameters(base::TimeTicks timebase,
                                base::TimeDelta interval) override {
     uint64_t timebase_us = timebase.ToInternalValue();
     uint64_t interval_us = interval.ToInternalValue();
 
     // Ignore updates with interval 0.
     if (!interval_us)
       return;
 
     uint64_t offset_us = timebase_us % interval_us;
@@ skipping 1185 matching lines @@
   DCHECK(event_loop);
   wl_event_loop_dispatch(event_loop, timeout.InMilliseconds());
 }
 
 void Server::Flush() {
   wl_display_flush_clients(wl_display_.get());
 }
 
 }  // namespace wayland
 }  // namespace exo