Cleanup: Remove unneeded forward declarations in webkit/.

webkit/tools/test_shell/test_shell_devtools_client.h

 // Copyright (c) 2011 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 TEST_SHELL_DEVTOOLS_CLIENT_H_
-#define TEST_SHELL_DEVTOOLS_CLIENT_H_
+#ifndef WEBKIT_TOOLS_TEST_SHELL_TEST_SHELL_DEVTOOLS_CLIENT_H_
+#define WEBKIT_TOOLS_TEST_SHELL_TEST_SHELL_DEVTOOLS_CLIENT_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/task.h"
 
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDevToolsFrontendClient.h"
 
 namespace WebKit {
 
 class WebDevToolsFrontend;
-struct WebDevToolsMessageData;
 
-} // namespace WebKit
+}  // namespace WebKit
 
 class TestShellDevToolsCallArgs;
 class TestShellDevToolsAgent;
 
 class TestShellDevToolsClient: public WebKit::WebDevToolsFrontendClient {
-
  public:
   TestShellDevToolsClient(TestShellDevToolsAgent* agent,
                           WebKit::WebView* web_view);
   virtual ~TestShellDevToolsClient();
 
   // WebDevToolsFrontendClient implementation
   virtual void sendFrontendLoaded();
   virtual void sendMessageToBackend(const WebKit::WebString& data);
   virtual void sendDebuggerCommandToAgent(const WebKit::WebString& command);
 
@@ skipping 10 matching lines @@
   void Call(const TestShellDevToolsCallArgs& args);
 
   base::WeakPtrFactory<TestShellDevToolsClient> weak_factory_;
   TestShellDevToolsAgent* dev_tools_agent_;
   WebKit::WebView* web_view_;
   scoped_ptr<WebKit::WebDevToolsFrontend> web_tools_frontend_;
 
   DISALLOW_COPY_AND_ASSIGN(TestShellDevToolsClient);
 };
 
-#endif  // TEST_SHELL_DEVTOOLS_CLIENT_H_
+#endif  // WEBKIT_TOOLS_TEST_SHELL_TEST_SHELL_DEVTOOLS_CLIENT_H_