Fix app list drag view being hidden on reparent when synchronous drag is setting up.

ui/app_list/views/apps_grid_view_unittest.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/views/apps_grid_view.h"
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
@@ skipping 197 matching lines @@
   virtual void DispatchEndDragEventForReparent(
       bool events_forwarded_to_drag_drop_host) OVERRIDE {}
 
   virtual bool IsPointOutsideOfFolderBoundary(const gfx::Point& point)
       OVERRIDE {
     return false;
   }
 
   virtual bool IsOEMFolder() const OVERRIDE { return false; }
 
+  virtual void SetRootLevelDragViewVisible(bool visible) OVERRIDE {}
+
   bool show_bubble() { return show_bubble_; }
 
  private:
   bool show_bubble_;
 
   DISALLOW_COPY_AND_ASSIGN(TestAppsGridViewFolderDelegate);
 };
 
 TEST_F(AppsGridViewTest, CreatePage) {
   // Fully populates a page.
@@ skipping 480 matching lines @@
   AppListItemView* item_view = GetItemViewAt(0);
   ASSERT_TRUE(item_view);
   const views::Label* title_label = item_view->title();
   EXPECT_FALSE(title_label->GetTooltipText(
       title_label->bounds().CenterPoint(), &actual_tooltip));
   EXPECT_EQ(title, base::UTF16ToUTF8(title_label->text()));
 }
 
 }  // namespace test
 }  // namespace app_list