Decouple BrowserCompositorOutputSurface from BeginFrameSource.

content/browser/compositor/software_browser_compositor_output_surface.cc

Index: content/browser/compositor/software_browser_compositor_output_surface.cc
diff --git a/content/browser/compositor/software_browser_compositor_output_surface.cc b/content/browser/compositor/software_browser_compositor_output_surface.cc
index 4e6fd5f83a548d2b678b64c6310fd7e89be60462..91488f687f4d6cfd71803a81951ca1b8b596110f 100644
--- a/content/browser/compositor/software_browser_compositor_output_surface.cc
+++ b/content/browser/compositor/software_browser_compositor_output_surface.cc
@@ -23,12 +23,10 @@ namespace content {
 
 SoftwareBrowserCompositorOutputSurface::SoftwareBrowserCompositorOutputSurface(
     std::unique_ptr<cc::SoftwareOutputDevice> software_device,
-    const scoped_refptr<ui::CompositorVSyncManager>& vsync_manager,
-    cc::SyntheticBeginFrameSource* begin_frame_source,
+    const UpdateVSyncParametersCallback& update_vsync_parameters_callback,
     scoped_refptr<base::SingleThreadTaskRunner> task_runner)
     : BrowserCompositorOutputSurface(std::move(software_device),
-                                     vsync_manager,
-                                     begin_frame_source),
+                                     update_vsync_parameters_callback),
       task_runner_(std::move(task_runner)),
       weak_factory_(this) {}
 
@@ -80,11 +78,8 @@ void SoftwareBrowserCompositorOutputSurface::SwapBuffers(
                                     frame.latency_info));
 
   gfx::VSyncProvider* vsync_provider = software_device()->GetVSyncProvider();
-  if (vsync_provider) {
-    vsync_provider->GetVSyncParameters(base::Bind(
-        &BrowserCompositorOutputSurface::OnUpdateVSyncParametersFromGpu,
-        weak_factory_.GetWeakPtr()));
-  }
+  if (vsync_provider)
+    vsync_provider->GetVSyncParameters(update_vsync_parameters_callback_);
 
   task_runner_->PostTask(
       FROM_HERE,