Remove the 2-level input method system & InputMethodBridge.

ui/aura/window_delegate.h

Index: ui/aura/window_delegate.h
diff --git a/ui/aura/window_delegate.h b/ui/aura/window_delegate.h
index c344ac23bf3759ce0507c30fe27eeae87c379146..4ba7ddcf60d8f89f881eba181056985de3abe35f 100644
--- a/ui/aura/window_delegate.h
+++ b/ui/aura/window_delegate.h
@@ -46,10 +46,6 @@ class AURA_EXPORT WindowDelegate : public ui::EventHandler {
   virtual void OnBoundsChanged(const gfx::Rect& old_bounds,
                                const gfx::Rect& new_bounds) = 0;
 
-  // Returns the focused text input client within this window.
-  // This function does not look at child windows.
-  virtual ui::TextInputClient* GetFocusedTextInputClient() = 0;
-
   // Returns the native cursor for the specified point, in window coordinates,
   // or NULL for the default cursor.
   virtual gfx::NativeCursor GetCursor(const gfx::Point& point) = 0;