views: Forward declare NativeWebKeyboardEvent instead of including its header file.

chrome/browser/ui/views/unhandled_keyboard_event_handler.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_UNHANDLED_KEYBOARD_EVENT_HANDLER_H_
 #define CHROME_BROWSER_UI_VIEWS_UNHANDLED_KEYBOARD_EVENT_HANDLER_H_
 
-#include "content/public/browser/native_web_keyboard_event.h"
-#include "ui/views/view.h"
+#include "base/basictypes.h"
+
+namespace content {
+struct NativeWebKeyboardEvent;
+}
 
 namespace views {
 class FocusManager;
-}  // namespace views
+}
 
 // This class handles unhandled keyboard messages coming back from the renderer
 // process.
 class UnhandledKeyboardEventHandler {
  public:
   UnhandledKeyboardEventHandler();
   ~UnhandledKeyboardEventHandler();
 
   void HandleKeyboardEvent(const content::NativeWebKeyboardEvent& event,
                            views::FocusManager* focus_manager);
 
  private:
 #if defined(OS_WIN)
   // Whether to ignore the next Char keyboard event.
   // If a RawKeyDown event was handled as a shortcut key, then we're done
   // handling it and should eat any Char event that the translate phase may
   // have produced from it. (Handling this event may cause undesirable effects,
   // such as a beep if DefWindowProc() has no default handling for the given
   // Char.)
   bool ignore_next_char_event_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(UnhandledKeyboardEventHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_UNHANDLED_KEYBOARD_EVENT_HANDLER_H_