Force-generate a frame before the end of a layout test.

components/test_runner/web_test_runner.h

 // Copyright 2014 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.
 
 #ifndef COMPONENTS_TEST_RUNNER_WEB_TEST_RUNNER_H_
 #define COMPONENTS_TEST_RUNNER_WEB_TEST_RUNNER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 25 matching lines @@
 
   // If true, WebTestDelegate::audioData returns an audio dump and no text
   // or pixel results are available.
   virtual bool ShouldDumpAsAudio() const = 0;
   virtual void GetAudioData(std::vector<unsigned char>* buffer_view) const = 0;
 
   // Reports if tests requested a recursive layout dump of all frames
   // (i.e. by calling testRunner.dumpChildFramesAsText() from javascript).
   virtual bool IsRecursiveLayoutDumpRequested() = 0;
 
+  // Runs any pending animations on existing widgets.
+  virtual void RunPendingAnimations();
+
   // Dumps layout of |frame| using the mode requested by the current test
   // (i.e. text mode if testRunner.dumpAsText() was called from javascript).
   virtual std::string DumpLayout(blink::WebLocalFrame* frame) = 0;
 
   // Snapshots image of |web_view| using the mode requested by the current test
   // and calls |callback| with the result.  Caller needs to ensure that
   // |web_view| stays alive until |callback| is called.
   virtual void DumpPixelsAsync(
       blink::WebView* web_view,
       const base::Callback<void(const SkBitmap&)>& callback) = 0;
@@ skipping 25 matching lines @@
   virtual void InitializeWebViewWithMocks(blink::WebView* web_view) = 0;
 
   // Sets focus on the given view.  Internally tracks currently focused view,
   // to aid in defocusing previously focused views at the right time.
   virtual void SetFocus(blink::WebView* web_view, bool focus) = 0;
 };
 
 }  // namespace test_runner
 
 #endif  // COMPONENTS_TEST_RUNNER_WEB_TEST_RUNNER_H_