Hook up ui::Compositor to Display's 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 151ed5fc40618f554de75cb62292284d0068787c..c08ce39e81ceaed7e4cdfe9b10d601ace981f87d 100644
--- a/content/browser/compositor/software_browser_compositor_output_surface.cc
+++ b/content/browser/compositor/software_browser_compositor_output_surface.cc
@@ -23,8 +23,11 @@ namespace content {
 
 SoftwareBrowserCompositorOutputSurface::SoftwareBrowserCompositorOutputSurface(
     scoped_ptr<cc::SoftwareOutputDevice> software_device,
-    const scoped_refptr<ui::CompositorVSyncManager>& vsync_manager)
-    : BrowserCompositorOutputSurface(std::move(software_device), vsync_manager),
+    const scoped_refptr<ui::CompositorVSyncManager>& vsync_manager,
+    scoped_ptr<cc::SyntheticBeginFrameSource> synthetic_begin_frame_source)
+    : BrowserCompositorOutputSurface(std::move(software_device),
+                                     vsync_manager,
+                                     std::move(synthetic_begin_frame_source)),
       weak_factory_(this) {}
 
 SoftwareBrowserCompositorOutputSurface::