focus reverse traversal was not working for TextfieldViews.

views/controls/textfield/native_textfield_win.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "views/controls/textfield/native_textfield_win.h"
 
 #include <algorithm>
 
 #include "app/clipboard/clipboard.h"
 #include "app/clipboard/scoped_clipboard_writer.h"
@@ skipping 256 matching lines @@
     return;
 
   if (top == 0 && bottom == 0) {
     // Do nothing, default margins are 0 already.
     return;
   }
   // Non-zero margins case.
   NOTIMPLEMENTED();
 }
 
-void NativeTextfieldWin::SetFocus() {
+bool NativeTextfieldWin::SetFocus() {
   // Focus the associated HWND.
   //container_view_->Focus();
   ::SetFocus(m_hWnd);
+  return true;
 }
 
 View* NativeTextfieldWin::GetView() {
   return container_view_;
 }
 
 gfx::NativeView NativeTextfieldWin::GetTestingHandle() const {
   return m_hWnd;
 }
 
@@ skipping 781 matching lines @@
 ////////////////////////////////////////////////////////////////////////////////
 // NativeTextfieldWrapper, public:
 
 // static
 NativeTextfieldWrapper* NativeTextfieldWrapper::CreateWrapper(
     Textfield* field) {
   return new NativeTextfieldWin(field);
 }
 
 }  // namespace views