focus reverse traversal was not working for TextfieldViews.

views/controls/textfield/native_textfield_win.cc

Index: views/controls/textfield/native_textfield_win.cc
diff --git a/views/controls/textfield/native_textfield_win.cc b/views/controls/textfield/native_textfield_win.cc
index 581e40f2bb0d1316e40c9e8586f07e51b9aafe9a..8e7f9f536abe3326f43d32071b2b2a9fbee50459 100644
--- a/views/controls/textfield/native_textfield_win.cc
+++ b/views/controls/textfield/native_textfield_win.cc
@@ -274,10 +274,11 @@ void NativeTextfieldWin::UpdateVerticalMargins() {
   NOTIMPLEMENTED();
 }
 
-void NativeTextfieldWin::SetFocus() {
+bool NativeTextfieldWin::SetFocus() {
   // Focus the associated HWND.
   //container_view_->Focus();
   ::SetFocus(m_hWnd);
+  return true;
 }
 
 View* NativeTextfieldWin::GetView() {
@@ -302,6 +303,23 @@ bool NativeTextfieldWin::IsIMEComposing() const {
   return composition_size > 0;
 }
 
+bool NativeTextfieldWin::HandleKeyPressed(const views::KeyEvent& e) {
+  return false;
+}
+
+bool NativeTextfieldWin::HandleKeyReleased(const views::KeyEvent& e) {
+  return false;
+}
+
+void NativeTextfieldWin::HandleWillGainFocus() {
+}
+
+void NativeTextfieldWin::HandleDidGainFocus() {
+}
+
+void NativeTextfieldWin::HandleWillLoseFocus() {
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // NativeTextfieldWin, menus::SimpleMenuModel::Delegate implementation: