Give up focus if the focused view becomes unfocusable

ui/views/window/dialog_client_view.cc

 // Copyright (c) 2012 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 "ui/views/window/dialog_client_view.h"
 
 #include <algorithm>
 
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "ui/views/controls/button/blue_button.h"
@@ skipping 350 matching lines @@
   const string16 title = GetDialogDelegate()->GetDialogButtonLabel(type);
   LabelButton* button = NULL;
   if (GetDialogDelegate()->UseNewStyleForThisDialog() &&
       GetDialogDelegate()->GetDefaultDialogButton() == type &&
       GetDialogDelegate()->ShouldDefaultButtonBeBlue()) {
     button = new BlueButton(this, title);
   } else {
     button = new LabelButton(this, title);
     button->SetStyle(Button::STYLE_NATIVE_TEXTBUTTON);
   }
-  button->set_focusable(true);
+  button->SetFocusable(true);
 
   const int kDialogMinButtonWidth = 75;
   button->set_min_size(gfx::Size(kDialogMinButtonWidth, 0));
   button->SetGroup(kButtonGroup);
   return button;
 }
 
 void DialogClientView::UpdateButton(LabelButton* button,
                                     ui::DialogButton type) {
   DialogDelegate* dialog = GetDialogDelegate();
@@ skipping 21 matching lines @@
       gfx::Insets(0, kButtonHEdgeMarginNew,
                   kButtonVEdgeMarginNew, kButtonHEdgeMarginNew);
 }
 
 void DialogClientView::Close() {
   GetWidget()->Close();
   GetDialogDelegate()->OnClosed();
 }
 
 }  // namespace views