Move root_window.* to window_event_dispatcher.*

ash/wm/workspace/snap_sizer_unittest.cc

 // Copyright 2013 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 "ash/wm/workspace/snap_sizer.h"
 
 #include "ash/ash_switches.h"
 #include "ash/screen_util.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/wm/window_state.h"
 #include "ash/wm/window_util.h"
 #include "base/command_line.h"
-#include "ui/aura/root_window.h"
 #include "ui/aura/test/test_window_delegate.h"
 #include "ui/aura/window.h"
+#include "ui/aura/window_event_dispatcher.h"
 #include "ui/gfx/screen.h"
 
 namespace ash {
 
 typedef test::AshTestBase SnapSizerTest;
 
 using internal::SnapSizer;
 
 // Test that a window gets properly snapped to the display's edges in a
 // multi monitor environment.
@@ skipping 364 matching lines @@
       window->bounds().width(), // No expectation for the width.
       kWorkAreaBounds.height());
   EXPECT_EQ(expected_snapped_bounds.ToString(),
             window->GetBoundsInScreen().ToString());
 
   // The window should still be auto managed despite being right maximized.
   EXPECT_TRUE(window_state->window_position_managed());
 }
 
 }  // namespace ash