Add two pixel-based compositor unittests.

ui/gfx/compositor/test_layer_animation_observer.h

-// 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.
-
-#ifndef UI_GFX_COMPOSITOR_TEST_LAYER_ANIMATION_OBSERVER_
-#define UI_GFX_COMPOSITOR_TEST_LAYER_ANIMATION_OBSERVER_
-#pragma once
-
-#include "base/compiler_specific.h"
-#include "ui/gfx/compositor/layer_animation_observer.h"
-
-namespace ui {
-
-class LayerAnimationSequence;
-
-// Listens to animation ended notifications. Remembers the last sequence that
-// it was notified about.
-class TestLayerAnimationObserver : public LayerAnimationObserver {
- public:
-  TestLayerAnimationObserver();
-  virtual ~TestLayerAnimationObserver();
-
-  virtual void OnLayerAnimationEnded(
-      const LayerAnimationSequence* sequence) OVERRIDE;
-
-  virtual void OnLayerAnimationAborted(
-      const LayerAnimationSequence* sequence) OVERRIDE;
-
-  virtual void OnLayerAnimationScheduled(
-      const LayerAnimationSequence* sequence) OVERRIDE;
-
-
-  const LayerAnimationSequence* last_ended_sequence() const {
-    return last_ended_sequence_;
-  }
-
-  const LayerAnimationSequence* last_scheduled_sequence() const {
-    return last_scheduled_sequence_;
-  }
-
-  const LayerAnimationSequence* last_aborted_sequence() const {
-    return last_aborted_sequence_;
-  }
-
- private:
-  const LayerAnimationSequence* last_ended_sequence_;
-  const LayerAnimationSequence* last_scheduled_sequence_;
-  const LayerAnimationSequence* last_aborted_sequence_;
-
-  // Copy and assign are allowed.
-};
-
-}  // namespace ui
-
-#endif  // UI_GFX_COMPOSITOR_TEST_LAYER_ANIMATION_OBSERVER_