Redesigns the text input focus handling.

ui/views/widget/widget.h

Index: ui/views/widget/widget.h
diff --git a/ui/views/widget/widget.h b/ui/views/widget/widget.h
index 7f037744e566069da7994d5110b385297df78335..edd2143ea96385517d25eac86f10cf6aabd8183b 100644
--- a/ui/views/widget/widget.h
+++ b/ui/views/widget/widget.h
@@ -45,6 +45,7 @@ namespace ui {
 class Accelerator;
 class Compositor;
 class DefaultThemeProvider;
+class InputMethod;
 class Layer;
 class NativeTheme;
 class OSExchangeData;
@@ -538,6 +539,11 @@ class VIEWS_EXPORT Widget : public internal::NativeWidgetDelegate,
   InputMethod* GetInputMethod();
   const InputMethod* GetInputMethod() const;
 
+  // Returns the ui::InputMethod for this widget.
+  // TODO(yukishiino): Rename this method to GetInputMethod once we remove
+  // views::InputMethod.
+  ui::InputMethod* GetHostInputMethod();
+
   // Starts a drag operation for the specified view. This blocks until the drag
   // operation completes. |view| can be NULL.
   // If the view is non-NULL it can be accessed during the drag by calling