Integrate the new input method API for Views into Chromium.

views/widget/native_widget.h

Index: views/widget/native_widget.h
diff --git a/views/widget/native_widget.h b/views/widget/native_widget.h
index b3624536512cb9476d29d3d68bfde1fc02105260..6732cc462ed8faee0f2953e9bb6dcb2289e93867 100644
--- a/views/widget/native_widget.h
+++ b/views/widget/native_widget.h
@@ -20,6 +20,7 @@ class OSExchangeData;
 
 namespace views {
 
+class InputMethod;
 class TooltipManager;
 class Widget;
 
@@ -76,6 +77,17 @@ class NativeWidget {
   // Returns true if this native widget is capturing all events.
   virtual bool HasNativeCapture() const = 0;
 
+  // Returns the InputMethod for this native widget.
+  // Note that all widgets in a widget hierarchy share the same input method.
+  // TODO(suzhe): rename to GetInputMethod() when NativeWidget implementation
+  // class doesn't inherit Widget anymore.
+  virtual InputMethod* GetInputMethodNative() = 0;
+
+  // Sets a different InputMethod instance to this native widget. The instance
+  // must not be initialized, the ownership will be assumed by the native
+  // widget. It's only for testing purpose.
+  virtual void ReplaceInputMethod(InputMethod* input_method) = 0;
+
  protected:
   friend class Widget;