OverscrollGlow for mainThread-{CHROMIUM CHANGES}

content/renderer/render_widget.h

Index: content/renderer/render_widget.h
diff --git a/content/renderer/render_widget.h b/content/renderer/render_widget.h
index 5b82c409ae3eb055ef1b60eb7e1ad4db03821a75..fb12732898ae7cee5ddadf301723bcdc71b45c3d 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -191,6 +191,11 @@ class CONTENT_EXPORT RenderWidget
   virtual void didHandleGestureEvent(const blink::WebGestureEvent& event,
                                      bool event_cancelled);
   virtual void showImeIfNeeded();
+  virtual void didOverscroll(

[jdduke (slow), 2015/06/08 14:52:56]

Nit: This should be in the same order as the declaration (after
didHandleGestureEvent).

+      const blink::WebFloatSize& unusedDelta,
+      const blink::WebFloatSize& accumulatedRootOverScroll,
+      const blink::WebFloatPoint& position,
+      const blink::WebFloatSize& velocity);
 
 #if defined(OS_ANDROID)
   // Notifies that a tap was not consumed, so showing a UI for the unhandled