focus reverse traversal was not working for TextfieldViews.

views/controls/textfield/native_textfield_wrapper.h

Index: views/controls/textfield/native_textfield_wrapper.h
diff --git a/views/controls/textfield/native_textfield_wrapper.h b/views/controls/textfield/native_textfield_wrapper.h
index eb5245fd7baf4f17f5d1d4ad412374a4d2aae9f9..5c3725865a70b8df7539aeb64a76329877841b27 100644
--- a/views/controls/textfield/native_textfield_wrapper.h
+++ b/views/controls/textfield/native_textfield_wrapper.h
@@ -15,6 +15,7 @@ class Insets;
 
 namespace views {
 
+class KeyEvent;
 class Textfield;
 class View;
 
@@ -77,8 +78,9 @@ class NativeTextfieldWrapper {
   // Updates the vertical margins for the native text field.
   virtual void UpdateVerticalMargins() = 0;
 
-  // Sets the focus to the text field.
-  virtual void SetFocus() = 0;
+  // Sets the focus to the text field. Returns false if the wrapper
+  // didn't take focus.
+  virtual bool SetFocus() = 0;
 
   // Retrieves the views::View that hosts the native control.
   virtual View* GetView() = 0;
@@ -89,6 +91,23 @@ class NativeTextfieldWrapper {
   // Returns whether or not an IME is composing text.
   virtual bool IsIMEComposing() const = 0;
 
+  // Following methods are to forward key/focus related events to the
+  // views wrapper so that TextfieldViews can handle key inputs without
+  // having a focus.
+
+  // Invoked when a key is pressed/release on Textfield.  Subclasser
+  // should return true if the event has been processed and false
+  // otherwise.
+  // See also View::OnKeyPressed/OnKeyReleased.
+  virtual bool HandleKeyPressed(const views::KeyEvent& e) = 0;
+  virtual bool HandleKeyReleased(const views::KeyEvent& e) = 0;
+
+  // Invoked when a focus is being moved from or to the Textfield.
+  // See also View::WillGainFocus/DidGainFocus/WillLoseFocus.
+  virtual void HandleWillGainFocus() = 0;
+  virtual void HandleDidGainFocus() = 0;
+  virtual void HandleWillLoseFocus() = 0;
+
   // Creates an appropriate NativeTextfieldWrapper for the platform.
   static NativeTextfieldWrapper* CreateWrapper(Textfield* field);
 };