Give up focus if the focused view becomes unfocusable

ui/views/controls/scrollbar/native_scroll_bar_views.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/scrollbar/native_scroll_bar_views.h"
 
 #include "base/logging.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/path.h"
@@ skipping 58 matching lines @@
 
   ScrollBar* scroll_bar_;
 };
 
 /////////////////////////////////////////////////////////////////////////////
 // ScrollBarButton
 
 ScrollBarButton::ScrollBarButton(ButtonListener* listener, Type type)
     : BaseScrollBarButton(listener),
       type_(type) {
-  set_focusable(false);
-  set_accessibility_focusable(false);
+  SetFocusable(false);
+  SetAccessibilityFocusable(false);
 }
 
 ScrollBarButton::~ScrollBarButton() {
 }
 
 gfx::Size ScrollBarButton::GetPreferredSize() {
   return GetNativeTheme()->GetPartSize(GetNativeThemePart(),
                                        GetNativeThemeState(),
                                        GetNativeThemeParams());
 }
@@ skipping 59 matching lines @@
 
   return state;
 }
 
 /////////////////////////////////////////////////////////////////////////////
 // ScrollBarThumb
 
 ScrollBarThumb::ScrollBarThumb(BaseScrollBar* scroll_bar)
     : BaseScrollBarThumb(scroll_bar),
       scroll_bar_(scroll_bar) {
-  set_focusable(false);
-  set_accessibility_focusable(false);
+  SetFocusable(false);
+  SetAccessibilityFocusable(false);
 }
 
 ScrollBarThumb::~ScrollBarThumb() {
 }
 
 gfx::Size ScrollBarThumb::GetPreferredSize() {
   return GetNativeTheme()->GetPartSize(GetNativeThemePart(),
                                        GetNativeThemeState(),
                                        GetNativeThemeParams());
 }
@@ skipping 243 matching lines @@
   thumb_params.scrollbar_thumb.is_hovering = false;
   gfx::Size track_size = theme->GetPartSize(
       ui::NativeTheme::kScrollbarVerticalThumb,
       ui::NativeTheme::kNormal,
       thumb_params);
 
   return std::max(track_size.width(), button_size.width());
 }
 
 }  // namespace views