Give up focus if the focused view becomes unfocusable

ui/views/controls/tabbed_pane/tabbed_pane.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/controls/tabbed_pane/tabbed_pane.h"
 
 #include "base/logging.h"
 #include "ui/base/accessibility/accessible_view_state.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "ui/gfx/canvas.h"
@@ skipping 220 matching lines @@
   } else {
     canvas->sk_canvas()->drawLine(0, line_y, line_end, line_y, paint);
   }
 }
 
 TabbedPane::TabbedPane()
   : listener_(NULL),
     tab_strip_(new TabStrip(this)),
     contents_(new View()),
     selected_tab_index_(-1) {
-  set_focusable(true);
+  SetFocusable(true);
   AddChildView(tab_strip_);
   AddChildView(contents_);
 }
 
 TabbedPane::~TabbedPane() {}
 
 int TabbedPane::GetTabCount() {
   DCHECK_EQ(tab_strip_->child_count(), contents_->child_count());
   return contents_->child_count();
 }
@@ skipping 110 matching lines @@
     selected_tab->NotifyAccessibilityEvent(
         ui::AccessibilityTypes::EVENT_FOCUS, true);
   }
 }
 
 void TabbedPane::GetAccessibleState(ui::AccessibleViewState* state) {
   state->role = ui::AccessibilityTypes::ROLE_PAGETABLIST;
 }
 
 }  // namespace views