Use correct WebView from EventSender.

components/test_runner/web_frame_test_proxy.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_FRAME_TEST_PROXY_H_
 #define COMPONENTS_TEST_RUNNER_WEB_FRAME_TEST_PROXY_H_
 
 #include <utility>
 
 #include "base/logging.h"
@@ skipping 268 matching lines @@
   }
 
   void checkIfAudioSinkExistsAndIsAuthorized(
       const blink::WebString& sink_id,
       const blink::WebSecurityOrigin& security_origin,
       blink::WebSetSinkIdCallbacks* web_callbacks) override {
     test_client()->checkIfAudioSinkExistsAndIsAuthorized(
         sink_id, security_origin, web_callbacks);
   }
 
+  void didClearWindowObject(blink::WebLocalFrame* frame) override {
+    test_client()->didClearWindowObject(frame);
+    Base::didClearWindowObject(frame);
+  }
+
  private:
   DISALLOW_COPY_AND_ASSIGN(WebFrameTestProxy);
 };
 
 }  // namespace test_runner
 
 #endif  // COMPONENTS_TEST_RUNNER_WEB_FRAME_TEST_PROXY_H_