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

ui/app_list/views/tile_item_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/tile_item_view.h"
 
 #include "ui/app_list/app_list_constants.h"
 #include "ui/app_list/views/app_list_main_view.h"
 #include "ui/views/background.h"
 #include "ui/views/controls/image_view.h"
@@ skipping 35 matching lines @@
 }
 
 void TileItemView::SetSelected(bool selected) {
   if (selected == selected_)
     return;
 
   selected_ = selected;
   UpdateBackgroundColor();
 
   if (selected)
-    NotifyAccessibilityEvent(ui::AX_EVENT_FOCUS, true);
+    NotifyAccessibilityEvent(ui::AX_EVENT_SELECTION, true);

[sky, 2016/02/14 16:21:52]

Same comment here.

 }
 
 void TileItemView::SetParentBackgroundColor(SkColor color) {
   parent_background_color_ = color;
   UpdateBackgroundColor();
 }
 
 void TileItemView::SetHoverStyle(HoverStyle hover_style) {
   if (hover_style == HOVER_STYLE_DARKEN_BACKGROUND) {
     image_shadow_animator_.reset();
@@ skipping 78 matching lines @@
   // truncation in making the tooltip. We do not want the label itself to have a
   // tooltip, so we only temporarily enable it to get the tooltip text from the
   // label, then disable it again.
   title_->SetHandlesTooltips(true);
   bool handled = title_->GetTooltipText(p, tooltip);
   title_->SetHandlesTooltips(false);
   return handled;
 }
 
 }  // namespace app_list