Add flow control between renderer and GPU processes, and, on Mac OS X,...

chrome/browser/renderer_host/render_widget_host.cc

Index: chrome/browser/renderer_host/render_widget_host.cc
===================================================================
--- chrome/browser/renderer_host/render_widget_host.cc	(revision 67289)
+++ chrome/browser/renderer_host/render_widget_host.cc	(working copy)
@@ -1056,7 +1056,11 @@
 void RenderWidgetHost::OnAcceleratedSurfaceBuffersSwapped(
     gfx::PluginWindowHandle window, uint64 surface_id) {
   if (view_) {
-    view_->AcceleratedSurfaceBuffersSwapped(window, surface_id);
+    // This code path could be updated to implement flow control for
+    // updating of accelerated plugins as well. However, if we add support
+    // for composited plugins then this is not necessary.
+    view_->AcceleratedSurfaceBuffersSwapped(window, surface_id,
+                                            0, 0, 0);
   }
 }
 #elif defined(OS_POSIX)