NOT READY FOR REVIEW - Add support for custom animation timers.

ui/compositor/test/test_layer_animation_timer.h

Index: ui/compositor/test/test_layer_animation_timer.h
diff --git a/ui/compositor/test/test_layer_animation_timer.h b/ui/compositor/test/test_layer_animation_timer.h
new file mode 100644
index 0000000000000000000000000000000000000000..b8c1a9dc72ca5215334a27d18442e08c0191d2a6
--- /dev/null
+++ b/ui/compositor/test/test_layer_animation_timer.h
@@ -0,0 +1,33 @@
+// 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.
+
+#ifndef UI_COMPOSITOR_TEST_TEST_LAYER_ANIMATION_TIMER_H_
+#define UI_COMPOSITOR_TEST_TEST_LAYER_ANIMATION_TIMER_H_
+
+#include "base/compiler_specific.h"
+#include "ui/compositor/layer_animation_timer.h"
+
+namespace ui {
+
+class TestLayerAnimationTimer : public LayerAnimationTimer {
+ public:
+  TestLayerAnimationTimer();
+  virtual ~TestLayerAnimationTimer();
+
+  // Implementation of LayerAnimationTimer.
+  virtual void Start(AnimationContainerElement*) OVERRIDE;
+  virtual void Stop(AnimationContainerElement*) OVERRIDE;
+  virtual base::TimeTicks last_tick_time() const OVERRIDE;
+  virtual bool is_running() const OVERRIDE;
+
+  // This is meant to advance all started animations by the given delta.
+  void Advance(base::TimeDelta delta);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(TestLayerAnimationTimer);
+};
+
+}  // namespace ui
+
+#endif  // UI_COMPOSITOR_TEST_TEST_LAYER_ANIMATION_TIMER_H_