Views: Add new SetFocusBehavior method.

ash/system/audio/volume_view.cc

 // Copyright 2014 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 "ash/system/audio/volume_view.h"
 
 #include "ash/ash_constants.h"
 #include "ash/shell.h"
 #include "ash/system/audio/tray_audio.h"
 #include "ash/system/audio/tray_audio_delegate.h"
@@ skipping 92 matching lines @@
 VolumeView::VolumeView(SystemTrayItem* owner,
                        system::TrayAudioDelegate* audio_delegate,
                        bool is_default_view)
     : owner_(owner),
       audio_delegate_(audio_delegate),
       icon_(NULL),
       slider_(NULL),
       device_type_(NULL),
       more_(NULL),
       is_default_view_(is_default_view) {
-  SetFocusable(false);
+  SetFocusBehavior(FocusBehavior::NEVER);
   views::BoxLayout* box_layout = new views::BoxLayout(
       views::BoxLayout::kHorizontal, 0, 0, kBoxLayoutPadding);
   box_layout->SetDefaultFlex(0);
   SetLayoutManager(box_layout);
 
   icon_ = new VolumeButton(this, audio_delegate_);
   icon_->SetBorder(views::Border::CreateEmptyBorder(
       0, kTrayPopupPaddingHorizontal, 0, kExtraPaddingBetweenIconAndSlider));
   AddChildView(icon_);
 
@@ skipping 154 matching lines @@
   separator_->SetSize(gfx::Size(kSeparatorSize, bounds().height()));
 }
 
 void VolumeView::GetAccessibleState(ui::AXViewState* state) {
   // Intentionally overrides ActionableView, leaving |state| unset. A slider
   // childview exposes accessibility data.
 }
 
 }  // namespace tray
 }  // namespace ash