Make GetRootWindow() return a Window instead of a RootWindow.

chrome/browser/ui/views/tabs/tab_drag_controller_interactive_uitest.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 "chrome/browser/ui/views/tabs/tab_drag_controller_interactive_uitest.h"
 
 #include "ash/wm/window_state.h"
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/command_line.h"
@@ skipping 205 matching lines @@
   return ash::wm::GetWindowState(browser->window()->GetNativeWindow())->
       tracked_by_workspace();
 #endif
 }
 
 }  // namespace
 
 #if defined(USE_ASH) && !defined(OS_WIN)  // TODO(win_ash)
 class ScreenEventGeneratorDelegate : public aura::test::EventGeneratorDelegate {
  public:
-  explicit ScreenEventGeneratorDelegate(aura::RootWindow* root_window)
+  explicit ScreenEventGeneratorDelegate(aura::Window* root_window)
       : root_window_(root_window) {}
   virtual ~ScreenEventGeneratorDelegate() {}
 
   // EventGeneratorDelegate overrides:
   virtual aura::RootWindow* GetRootWindowAt(
       const gfx::Point& point) const OVERRIDE {
-    return root_window_;
+    return root_window_->GetDispatcher();
   }
 
   virtual aura::client::ScreenPositionClient* GetScreenPositionClient(
       const aura::Window* window) const OVERRIDE {
     return aura::client::GetScreenPositionClient(root_window_);
   }
 
  private:
-  aura::RootWindow* root_window_;
+  aura::Window* root_window_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenEventGeneratorDelegate);
 };
 
 #endif
 
 #if defined(USE_AURA) && !defined(OS_CHROMEOS)
 
 // Following classes verify a crash scenario. Specifically on Windows when focus
 // changes it can trigger capture being lost. This was causing a crash in tab
@@ skipping 1794 matching lines @@
                         DetachToBrowserTabDragControllerTest,
                         ::testing::Values("mouse", "touch"));
 INSTANTIATE_TEST_CASE_P(TabDragging,
                         DetachToBrowserTabDragControllerTestTouch,
                         ::testing::Values("touch", "touch docked"));
 #else
 INSTANTIATE_TEST_CASE_P(TabDragging,
                         DetachToBrowserTabDragControllerTest,
                         ::testing::Values("mouse"));
 #endif