Decouple BrowserCompositorOutputSurface from BeginFrameSource.

content/browser/compositor/offscreen_browser_compositor_output_surface.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 "content/browser/compositor/offscreen_browser_compositor_output_surface.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "build/build_config.h"
@@ skipping 13 matching lines @@
 using gpu::gles2::GLES2Interface;
 
 namespace content {
 
 static cc::ResourceFormat kFboTextureFormat = cc::RGBA_8888;
 
 OffscreenBrowserCompositorOutputSurface::
     OffscreenBrowserCompositorOutputSurface(
         scoped_refptr<ContextProviderCommandBuffer> context,
         scoped_refptr<ui::CompositorVSyncManager> vsync_manager,
-        cc::SyntheticBeginFrameSource* begin_frame_source,
         std::unique_ptr<display_compositor::CompositorOverlayCandidateValidator>
             overlay_candidate_validator)
     : BrowserCompositorOutputSurface(std::move(context),
                                      std::move(vsync_manager),
-                                     begin_frame_source,
                                      std::move(overlay_candidate_validator)),
       weak_ptr_factory_(this) {
   capabilities_.uses_default_gl_framebuffer = false;
 }
 
 OffscreenBrowserCompositorOutputSurface::
     ~OffscreenBrowserCompositorOutputSurface() {
   DiscardBackbuffer();
 }
 
@@ skipping 135 matching lines @@
     reflector_changed_ = true;
     EnsureBackbuffer();
   }
 }
 
 void OffscreenBrowserCompositorOutputSurface::OnSwapBuffersComplete() {
   client_->DidReceiveSwapBuffersAck();
 }
 
 }  // namespace content