Integrate the new input method API for Views into Chromium.

views/widget/widget.h

Index: views/widget/widget.h
diff --git a/views/widget/widget.h b/views/widget/widget.h
index b09493230de2bb07ae6aa446a5d17317c04a9503..aafac85f97206db4ba9068fa358dc519adffad37 100644
--- a/views/widget/widget.h
+++ b/views/widget/widget.h
@@ -33,6 +33,7 @@ using ui::ThemeProvider;
 namespace views {
 
 class DefaultThemeProvider;
+class InputMethod;
 class NativeWidget;
 class RootView;
 class TooltipManager;
@@ -218,6 +219,10 @@ class Widget : public internal::NativeWidgetDelegate,
   // TODO(beng): remove virtual.
   virtual FocusManager* GetFocusManager();
 
+  // Returns the InputMethod for this widget.
+  // Note that all widgets in a widget hierarchy share the same input method.
+  InputMethod* GetInputMethod() const;
+
   // Returns true if the native view |native_view| is contained in the
   // views::View hierarchy rooted at this widget.
   // TODO(beng): const.
@@ -267,7 +272,7 @@ class Widget : public internal::NativeWidgetDelegate,
       ui::AccessibilityTypes::Event event_type,
       bool send_native_event) = 0;
 
-  NativeWidget* native_widget() { return native_widget_; }
+  NativeWidget* native_widget() const { return native_widget_; }
 
   // Overridden from NativeWidgetDelegate:
   virtual void OnNativeFocus(gfx::NativeView focused_view) OVERRIDE;