TileItemView: Fixed ChromeVox selection upon deselection.

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 38 matching lines @@
 
 TileItemView::~TileItemView() {
 }
 
 void TileItemView::SetSelected(bool selected) {
   if (selected == selected_)
     return;
 
   selected_ = selected;
   UpdateBackgroundColor();
-  NotifyAccessibilityEvent(ui::AX_EVENT_FOCUS, true);
+
+  if (selected)
+    NotifyAccessibilityEvent(ui::AX_EVENT_FOCUS, true);
 }
 
 void TileItemView::SetParentBackgroundColor(SkColor color) {
   parent_background_color_ = color;
   UpdateBackgroundColor();
 }
 
 void TileItemView::SetIcon(const gfx::ImageSkia& icon) {
   icon_->SetImage(icon);
 }
@@ skipping 38 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