cros: Fix mouse over-scroll animation not happening.

ui/app_list/app_list_item_view.cc

 // Copyright (c) 2012 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/app_list_item_view.h"
 
 #include <algorithm>
 
 #include "base/utf_string_conversions.h"
 #include "ui/app_list/app_list_constants.h"
@@ skipping 198 matching lines @@
   menu_adapter.BuildMenu(context_menu_runner_->GetMenu());
   if (context_menu_runner_->RunMenuAt(
           GetWidget(), NULL, gfx::Rect(point, gfx::Size()),
           views::MenuItemView::TOPLEFT, views::MenuRunner::HAS_MNEMONICS) ==
       views::MenuRunner::MENU_DELETED)
     return;
 }
 
 void AppListItemView::StateChanged() {
   if (state() == BS_HOT || state() == BS_PUSHED) {
-    apps_grid_view_->SetSelectedItem(this);
+    // Don't auto select item if there is a running page transition.
+    if (!apps_grid_view_->HasPageTransition())
+      apps_grid_view_->SetSelectedItem(this);
     title_->SetEnabledColor(kTitleHoverColor);
   } else {
     apps_grid_view_->ClearSelectedItem(this);
     model_->SetHighlighted(false);
     title_->SetEnabledColor(kTitleColor);
   }
 }
 
 bool AppListItemView::ShouldEnterPushedState(const ui::Event& event) {
   // Don't enter pushed state for ET_GESTURE_TAP_DOWN so that hover gray
   // background does not show up during scroll.
   if (event.type() == ui::ET_GESTURE_TAP_DOWN)
     return false;
 
   return views::CustomButton::ShouldEnterPushedState(event);
 }
 
 }  // namespace app_list