Fix black background when locking with fullscreen window:

ui/compositor/test/compositor_test_support.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/compositor/test/compositor_test_support.h"
 
 #include "base/compiler_specific.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebKit.h"
+#include "ui/compositor/layer_animator.h"
 #include "webkit/glue/webkitplatformsupport_impl.h"
 
 namespace ui {
 
+namespace test {
+
+// static
+scoped_ptr<AnimationContainerTestHelper> CreateLayerAnimatorHelperForTest() {
+  LayerAnimator::set_disable_animations_for_test(false);
+
+  scoped_ptr<AnimationContainerTestHelper> result;
+  result.reset(
+      new AnimationContainerTestHelper(
+          internal::GetLayerAnimationContainer()));
+  return result.Pass();
+}
+
+}  // namespace test
+
 class CompositorTestPlatformSupport:
     public NON_EXPORTED_BASE(webkit_glue::WebKitPlatformSupportImpl) {
  public:
   virtual string16 GetLocalizedString(int message_id) OVERRIDE {
     return string16();
   }
 
   virtual base::StringPiece GetDataResource(
       int resource_id,
       ui::ScaleFactor scale_factor) OVERRIDE {
@@ skipping 28 matching lines @@
 }
 
 void CompositorTestSupport::Terminate() {
   DCHECK(g_webkit_support);
   WebKit::shutdown();
   delete g_webkit_support;
   g_webkit_support = NULL;
 }
 
 }  // namespace ui