text input focus: Supports Window::GetFocusedTextInputClient.

ui/aura/window.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 UI_AURA_WINDOW_H_
 #define UI_AURA_WINDOW_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 20 matching lines @@
 
 namespace gfx {
 class Display;
 class Transform;
 class Vector2d;
 }
 
 namespace ui {
 class EventHandler;
 class Layer;
+class TextInputClient;
 class Texture;
 }
 
 namespace aura {
 
 class LayoutManager;
 class WindowDelegate;
 class WindowObserver;
 class WindowTreeHost;
 
@@ skipping 160 matching lines @@
   // Converts |point| from |source|'s coordinates to |target|'s. If |source| is
   // NULL, the function returns without modifying |point|. |target| cannot be
   // NULL.
   static void ConvertPointToTarget(const Window* source,
                                    const Window* target,
                                    gfx::Point* point);
   static void ConvertRectToTarget(const Window* source,
                                   const Window* target,
                                   gfx::Rect* rect);
 
+  // Returns the focused text input client within this window.
+  // This function does not look at child windows.
+  ui::TextInputClient* GetFocusedTextInputClient();
+
   // Moves the cursor to the specified location relative to the window.
   void MoveCursorTo(const gfx::Point& point_in_window);
 
   // Returns the cursor for the specified point, in window coordinates.
   gfx::NativeCursor GetCursor(const gfx::Point& point) const;
 
   // Add/remove observer.
   void AddObserver(WindowObserver* observer);
   void RemoveObserver(WindowObserver* observer);
   bool HasObserver(const WindowObserver* observer) const;
@@ skipping 310 matching lines @@
   };
 
   std::map<const void*, Value> prop_map_;
 
   DISALLOW_COPY_AND_ASSIGN(Window);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_H_