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

libcef/browser/trace_subscriber.h

@@ -25,6 +25,8 @@ class CefTraceSubscriber {
                   CefRefPtr<CefEndTracingCallback> callback);
 
  private:
+  void ContinueEndTracing(CefRefPtr<CefEndTracingCallback> callback,
+                          const base::FilePath& tracing_file);
   void OnTracingFileResult(CefRefPtr<CefEndTracingCallback> callback,
                            const base::FilePath& tracing_file);