MacViews: Implement Full Keyboard Access.

ash/system/toast/toast_overlay.cc

 // Copyright 2016 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/toast/toast_overlay.h"
 
 #include "ash/screen_util.h"
 #include "ash/shelf/shelf.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shell.h"
@@ skipping 47 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(ToastOverlayLabel);
 };
 
 ToastOverlayLabel::ToastOverlayLabel(const std::string& label) {
   ui::ResourceBundle* rb = &ui::ResourceBundle::GetSharedInstance();
 
   SetText(base::UTF8ToUTF16(label));
   SetHorizontalAlignment(gfx::ALIGN_LEFT);
   SetFontList(rb->GetFontList(kTextFontStyle));
   SetAutoColorReadabilityEnabled(false);
-  SetFocusable(false);
+  SetFocusBehavior(views::View::FocusBehavior::NEVER);
   SetEnabledColor(SK_ColorWHITE);
   SetDisabledColor(SK_ColorWHITE);
   SetSubpixelRenderingEnabled(false);
 }
 
 ToastOverlayLabel::~ToastOverlayLabel() {}
 
 ///////////////////////////////////////////////////////////////////////////////
 //  ToastOverlayButton
 class ToastOverlayButton : public views::LabelButton {
@@ skipping 185 matching lines @@
 
 views::Widget* ToastOverlay::widget_for_testing() {
   return overlay_widget_.get();
 }
 
 void ToastOverlay::ClickDismissButtonForTesting(const ui::Event& event) {
   overlay_view_->button()->NotifyClick(event);
 }
 
 }  // namespace ash