Update to Chromium revision b0aa1fb5 (#296183).

- Restore CefRenderHandler::OnScrollOffsetChanged.
- Add new RT_PING and RT_SERVICE_WORKER resource type values.
- The resource type for image sub-resource loads has changed from RT_IMAGE to RT_PREFETCH (this is a regression, see http://crbug.com/415253#c23).
- Add a patch to fix a crash in Scheduler::swapQueuesRunPendingTasks* (http://crbug.com/415478).
- Add documentation for cef_key_event_type_t values.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1846 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

include/cef_render_handler.h

@@ -159,6 +159,12 @@ class CefRenderHandler : public virtual CefBase {
   /*--cef()--*/
   virtual void UpdateDragCursor(CefRefPtr<CefBrowser> browser,
                                 DragOperation operation) {}
+
+  ///
+  // Called when the scroll offset has changed.
+  ///
+  /*--cef()--*/
+  virtual void OnScrollOffsetChanged(CefRefPtr<CefBrowser> browser) {}
 };
 
 #endif  // CEF_INCLUDE_CEF_RENDER_HANDLER_H_