Disable BeginFrame scheduling for OOPIF

content/renderer/gpu/render_widget_compositor.cc

Index: content/renderer/gpu/render_widget_compositor.cc
diff --git a/content/renderer/gpu/render_widget_compositor.cc b/content/renderer/gpu/render_widget_compositor.cc
index 6bc64532ed973b203244c0509ca35d3c9ea5d922..282cea946a7c4d0d311eb84d8073c01f4ea6a472 100644
--- a/content/renderer/gpu/render_widget_compositor.cc
+++ b/content/renderer/gpu/render_widget_compositor.cc
@@ -221,8 +221,6 @@ void RenderWidgetCompositor::Initialize() {
 
   settings.throttle_frame_production =
       !cmd->HasSwitch(switches::kDisableGpuVsync);
-  settings.use_external_begin_frame_source =
-      cmd->HasSwitch(switches::kEnableBeginFrameScheduling);
   settings.main_frame_before_activation_enabled =
       cmd->HasSwitch(cc::switches::kEnableMainFrameBeforeActivation) &&
       !cmd->HasSwitch(cc::switches::kDisableMainFrameBeforeActivation);
@@ -235,6 +233,11 @@ void RenderWidgetCompositor::Initialize() {
     settings.use_compositor_animation_timelines = true;
     blink::WebRuntimeFeatures::enableCompositorAnimationTimelines(true);
   }
+  if (cmd->HasSwitch(switches::kEnableBeginFrameScheduling) &&
+      !widget_->for_subframe()) {
+    // TODO(simonhong): Apply BeginFrame scheduling for sub-frame.

[Charlie Reis, 2015/04/27 16:47:18]

Please list a bug number here.

[simonhong, 2015/04/27 20:49:33]

Done.

+    settings.use_external_begin_frame_source = true;
+  }
 
   settings.default_tile_size = CalculateDefaultTileSize(widget_);
   if (cmd->HasSwitch(switches::kDefaultTileWidth)) {