Add two pixel-based compositor unittests.

ui/gfx/compositor/compositor_test_support.cc

Index: ui/gfx/compositor/compositor_test_support.cc
diff --git a/ui/gfx/compositor/compositor_test_support.cc b/ui/gfx/compositor/compositor_test_support.cc
deleted file mode 100644
index e72bd0c8204bc5290b1077dbaab1144aa055e212..0000000000000000000000000000000000000000
--- a/ui/gfx/compositor/compositor_test_support.cc
+++ /dev/null
@@ -1,35 +0,0 @@
-// Copyright (c) 2011 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/gfx/compositor/compositor_test_support.h"
-
-#if defined(USE_WEBKIT_COMPOSITOR)
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebKit.h"
-#include "webkit/glue/webkitplatformsupport_impl.h"
-#endif
-
-namespace ui {
-
-#if defined(USE_WEBKIT_COMPOSITOR)
-static webkit_glue::WebKitPlatformSupportImpl* g_webkit_support;
-#endif
-
-void CompositorTestSupport::Initialize() {
-#if defined(USE_WEBKIT_COMPOSITOR)
-  DCHECK(!g_webkit_support);
-  g_webkit_support = new webkit_glue::WebKitPlatformSupportImpl;
-  WebKit::initialize(g_webkit_support);
-#endif
-}
-
-void CompositorTestSupport::Terminate() {
-#if defined(USE_WEBKIT_COMPOSITOR)
-  DCHECK(g_webkit_support);
-  WebKit::shutdown();
-  delete g_webkit_support;
-  g_webkit_support = NULL;
-#endif
-}
-
-}  // namespace ui