Move DumpBackForwardLists out of WebTestProxyBase.

components/test_runner/web_test_interfaces.h

 // Copyright 2013 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_INTERFACES_H_
 #define COMPONENTS_TEST_RUNNER_WEB_TEST_INTERFACES_H_
 
+#include <vector>
+
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "components/test_runner/test_runner_export.h"
 
 namespace blink {
 class WebAppBannerClient;
 class WebAudioDevice;
 class WebFrame;
 class WebFrameClient;
 class WebMediaStreamCenter;
@@ skipping 54 matching lines @@
   // of WebTestInterfaces.
   scoped_ptr<WebFrameTestClient> CreateWebFrameTestClient();
 
   // Creates a WebViewClient implementation providing test behavior (i.e.
   // providing a mocked speech recognizer).  The caller should guarantee that
   // the returned pointer won't be used beyond the lifetime of WebTestInterfaces
   // and/or the lifetime of |web_test_proxy_base|.
   scoped_ptr<WebViewTestClient> CreateWebViewTestClient(
       WebTestProxyBase* web_test_proxy_base);
 
+  // Gets a list of currently opened windows created by the current test.
+  std::vector<blink::WebView*> GetWindowList();
+
  private:
   scoped_ptr<TestInterfaces> interfaces_;
 
   DISALLOW_COPY_AND_ASSIGN(WebTestInterfaces);
 };
 
 }  // namespace test_runner
 
 #endif  // COMPONENTS_TEST_RUNNER_WEB_TEST_INTERFACES_H_