Decouple BrowserCompositorOutputSurface from BeginFrameSource.

content/browser/compositor/offscreen_browser_compositor_output_surface.h

Index: content/browser/compositor/offscreen_browser_compositor_output_surface.h
diff --git a/content/browser/compositor/offscreen_browser_compositor_output_surface.h b/content/browser/compositor/offscreen_browser_compositor_output_surface.h
index 983f5d3fe7d680012d83fab1458bae6f77f8ee86..141a5a6943f98aa2d1d25088a8c318b3e3c796ce 100644
--- a/content/browser/compositor/offscreen_browser_compositor_output_surface.h
+++ b/content/browser/compositor/offscreen_browser_compositor_output_surface.h
@@ -15,10 +15,6 @@
 #include "build/build_config.h"
 #include "content/browser/compositor/browser_compositor_output_surface.h"
 
-namespace ui {
-class CompositorVSyncManager;
-}
-
 namespace content {
 class ContextProviderCommandBuffer;
 class ReflectorTexture;
@@ -28,8 +24,7 @@ class OffscreenBrowserCompositorOutputSurface
  public:
   OffscreenBrowserCompositorOutputSurface(
       scoped_refptr<ContextProviderCommandBuffer> context,
-      scoped_refptr<ui::CompositorVSyncManager> vsync_manager,
-      cc::SyntheticBeginFrameSource* begin_frame_source,
+      const UpdateVSyncParametersCallback& update_vsync_parameters_callback,
       std::unique_ptr<display_compositor::CompositorOverlayCandidateValidator>
           overlay_candidate_validator);