Add testRunner.runIdleTasks() to force idle tasks to run.

content/shell/renderer/layout_test/blink_test_runner.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/shell/renderer/layout_test/blink_test_runner.h"
 
 #include <stddef.h>
 #include <algorithm>
 #include <clocale>
 #include <cmath>
@@ skipping 720 matching lines @@
   return placeholder->plugin();
 }
 
 blink::WebPoint BlinkTestRunner::ConvertDIPToNative(
     const blink::WebPoint& point_in_dip) const {
   float scale = render_view()->GetDeviceScaleFactorForTest();
   return blink::WebPoint(point_in_dip.x * scale,
                          point_in_dip.y * scale);
 }
 
+void BlinkTestRunner::RunIdleTasks(const base::Closure& callback) {
+    SchedulerRunIdleTasks(callback);
+}
+
 bool BlinkTestRunner::AddMediaStreamVideoSourceAndTrack(
     blink::WebMediaStream* stream) {
   DCHECK(stream);
 #if defined(ENABLE_WEBRTC)
   return AddVideoTrackToMediaStream(
       make_scoped_ptr(new MockVideoCapturerSource()),
       false,  // is_remote
       false,  // is_readonly
       stream);
 #else
@@ skipping 260 matching lines @@
   get_bluetooth_events_callbacks_.pop_front();
   callback.Run(events);
 }
 
 void BlinkTestRunner::ReportLeakDetectionResult(
     const LeakDetectionResult& report) {
   Send(new ShellViewHostMsg_LeakDetectionDone(routing_id(), report));
 }
 
 }  // namespace content