Debugging test failures from https://codereview.chromium.org/291843012/

ui/compositor/test/layer_animator_collection_test_controller.cc

Index: ui/compositor/test/layer_animator_collection_test_controller.cc
diff --git a/ui/compositor/test/layer_animator_collection_test_controller.cc b/ui/compositor/test/layer_animator_collection_test_controller.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6370ec8d60b5c88ba0d477443c71a7ae8174cc46
--- /dev/null
+++ b/ui/compositor/test/layer_animator_collection_test_controller.cc
@@ -0,0 +1,30 @@
+// Copyright 2014 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/layer_animator_collection_test_controller.h"
+
+#include "ui/compositor/layer_animator.h"
+
+namespace ui {
+
+LayerAnimatorCollectionTestController::LayerAnimatorCollectionTestController(
+    LayerAnimatorCollection* collection)
+    : collection_(collection) {
+  CHECK(collection_);
+}
+
+LayerAnimatorCollectionTestController::
+    ~LayerAnimatorCollectionTestController() {
+}
+
+void LayerAnimatorCollectionTestController::StopAllAnimators() {
+  std::set<scoped_refptr<LayerAnimator> > list = collection_->animators_;
+  for (std::set<scoped_refptr<LayerAnimator> >::iterator iter = list.begin();
+       iter != list.end();
+       ++iter) {
+    (*iter)->StopAnimating();
+  }
+}
+
+}  // namespace ui