Don't fire a FOCUS accessibility event on a View that doesn't have focus.

ui/app_list/views/start_page_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 "ui/app_list/views/start_page_view.h"
 
 #include <string>
 
 #include "base/i18n/rtl.h"
 #include "base/macros.h"
@@ skipping 68 matching lines @@
       : selected_(false),
         custom_launcher_page_name_(custom_launcher_page_name) {
     set_background(views::Background::CreateSolidBackground(kSelectedColor));
   }
   ~CustomLauncherPageBackgroundView() override {}
 
   void SetSelected(bool selected) {
     selected_ = selected;
     SetVisible(selected);
     if (selected)
-      NotifyAccessibilityEvent(ui::AX_EVENT_FOCUS, true);
+      NotifyAccessibilityEvent(ui::AX_EVENT_SELECTION, true);
   }
 
   bool selected() { return selected_; }
 
   // Overridden from views::View:
   void GetAccessibleState(ui::AXViewState* state) override {
     state->role = ui::AX_ROLE_BUTTON;
     state->name = base::UTF8ToUTF16(custom_launcher_page_name_);
   }
 
@@ skipping 396 matching lines @@
   // is enabled).
   if (event->type() == ui::ET_SCROLL && event->y_offset() < 0)
     MaybeOpenCustomLauncherPage();
 }
 
 TileItemView* StartPageView::GetTileItemView(size_t index) {
   return tiles_container_->GetTileItemView(index);
 }
 
 }  // namespace app_list