Make infobar controls focusable by default.

chrome/browser/ui/views/infobars/extension_infobar.cc

 // Copyright (c) 2011 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 "chrome/browser/ui/views/infobars/extension_infobar.h"
 
 #include "chrome/browser/extensions/extension_context_menu_model.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_infobar_delegate.h"
 #include "chrome/browser/platform_util.h"
@@ skipping 58 matching lines @@
 void ExtensionInfoBar::ViewHierarchyChanged(bool is_add,
                                             View* parent,
                                             View* child) {
   if (!is_add || (child != this) || (menu_ != NULL)) {
     InfoBarView::ViewHierarchyChanged(is_add, parent, child);
     return;
   }
 
   menu_ = new views::MenuButton(NULL, string16(), this, false);
   menu_->SetVisible(false);
+  menu_->set_focusable(true);
   AddChildView(menu_);
 
   ExtensionHost* extension_host = GetDelegate()->extension_host();
   AddChildView(extension_host->view());
 
   // This must happen after adding all other children so InfoBarView can ensure
   // the close button is the last child.
   InfoBarView::ViewHierarchyChanged(is_add, parent, child);
 
   // This must happen after adding all children because it can trigger layout,
@@ skipping 58 matching lines @@
 
   scoped_refptr<ExtensionContextMenuModel> options_menu_contents =
       new ExtensionContextMenuModel(extension, browser_, NULL);
   DCHECK_EQ(source, menu_);
   RunMenuAt(options_menu_contents.get(), menu_, views::MenuItemView::TOPLEFT);
 }
 
 ExtensionInfoBarDelegate* ExtensionInfoBar::GetDelegate() {
   return delegate_ ? delegate_->AsExtensionInfoBarDelegate() : NULL;
 }