Cleanup: Remove forward declarations in ui, part 2.

ui/aura/test/test_windows.h

Index: ui/aura/test/test_windows.h
===================================================================
--- ui/aura/test/test_windows.h	(revision 110049)
+++ ui/aura/test/test_windows.h	(working copy)
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef UI_AURA_TEST_TEST_UTILS_H_
-#define UI_AURA_TEST_TEST_UTILS_H_
+#ifndef UI_AURA_TEST_TEST_WINDOWS_H_
+#define UI_AURA_TEST_TEST_WINDOWS_H_
 #pragma once
 
 #include "base/compiler_specific.h"
@@ -11,10 +11,6 @@
 #include "ui/aura/test/test_window_delegate.h"
 #include "ui/aura/test/aura_test_base.h"
 
-namespace gfx {
-class Canvas;
-}
-
 namespace aura {
 namespace test {
 
@@ -32,4 +28,4 @@
 }  // namespace test
 }  // namespace aura
 
-#endif  // UI_AURA_TEST_TEST_UTILS_H_
+#endif  // UI_AURA_TEST_TEST_WINDOWS_H_