Make GetRootWindow() return a Window instead of a RootWindow.

ui/keyboard/keyboard_util.h

 // Copyright (c) 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 UI_KEYBOARD_KEYBOARD_UTIL_H_
 #define UI_KEYBOARD_KEYBOARD_UTIL_H_
 
 #include <string>
 
 #include "base/strings/string16.h"
+// TODO(beng): replace with forward decl once RootWindow is renamed.
+#include "ui/aura/window.h"
 #include "ui/keyboard/keyboard_export.h"
 
-namespace aura {
-class RootWindow;
-}
 struct GritResourceMap;
 
 namespace keyboard {
 
 // Enumeration of swipe directions.
 enum CursorMoveDirection {
   kCursorMoveRight = 0x01,
   kCursorMoveLeft = 0x02,
   kCursorMoveUp = 0x04,
   kCursorMoveDown = 0x08
 };
 
 // An enumeration of different keyboard control events that should be logged.
 enum KeyboardControlEvent {
   KEYBOARD_CONTROL_SHOW = 0,
   KEYBOARD_CONTROL_HIDE_AUTO,
   KEYBOARD_CONTROL_HIDE_USER,
   KEYBOARD_CONTROL_MAX,
 };
 
 // Returns true if the virtual keyboard is enabled.
 KEYBOARD_EXPORT bool IsKeyboardEnabled();
 
 // Insert |text| into the active TextInputClient associated with |root_window|,
 // if there is one. Returns true if |text| was successfully inserted. Note
 // that this may convert |text| into ui::KeyEvents for injection in some
 // special circumstances (i.e. VKEY_RETURN, VKEY_BACK).
 KEYBOARD_EXPORT bool InsertText(const base::string16& text,
-                                aura::RootWindow* root_window);
+                                aura::Window* root_window);
 
 // Move cursor when swipe on the virtualkeyboard. Returns true if cursor was
 // successfully moved according to |swipe_direction|.
 KEYBOARD_EXPORT bool MoveCursor(int swipe_direction,
                                 int modifier_flags,
-                                aura::RootWindow* root_window);
+                                aura::WindowEventDispatcher* dispatcher);
 
 // Sends a fabricated key event, where |type| is the event type, |key_value|
 // is the unicode value of the character, |key_code| is the legacy key code
 // value, and |shift_modifier| indicates if the shift key is being virtually
 // pressed. The event is dispatched to the active TextInputClient associated
 // with |root_window|. The type may be "keydown" or "keyup".
 KEYBOARD_EXPORT bool SendKeyEvent(std::string type,
                                    int key_value,
                                    int key_code,
                                    bool shift_modifier,
-                                   aura::RootWindow* root_window);
+                                   aura::WindowEventDispatcher* dispatcher);
 
 // Get the list of keyboard resources. |size| is populated with the number of
 // resources in the returned array.
 KEYBOARD_EXPORT const GritResourceMap* GetKeyboardExtensionResources(
     size_t* size);
 
 // Logs the keyboard control event as a UMA stat.
 void LogKeyboardControlEvent(KeyboardControlEvent event);
 
 }  // namespace keyboard
 
 #endif  // UI_KEYBOARD_KEYBOARD_UTIL_H_