CC Animations: Establish AnimationHost, AnimationTimeline and AnimationPlayer

cc/blink/web_compositor_animation_timeline_impl.cc

+// Copyright 2015 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 "cc/blink/web_compositor_animation_timeline_impl.h"
+
+#include "cc/animation/animation_id_provider.h"
+#include "cc/animation/animation_timeline.h"
+#include "cc/blink/web_compositor_animation_player_impl.h"
+#include "third_party/WebKit/public/platform/WebCompositorAnimationPlayerClient.h"
+
+using cc::AnimationTimeline;
+
+namespace cc_blink {
+
+WebCompositorAnimationTimelineImpl::WebCompositorAnimationTimelineImpl()
+    : animation_timeline_(AnimationTimeline::Create(
+          cc::AnimationIdProvider::NextTimelineId())) {
+}
+
+WebCompositorAnimationTimelineImpl::~WebCompositorAnimationTimelineImpl() {
+}
+
+cc::AnimationTimeline* WebCompositorAnimationTimelineImpl::animation_timeline()
+    const {
+  return animation_timeline_.get();
+}
+
+void WebCompositorAnimationTimelineImpl::playerAttached(
+    const blink::WebCompositorAnimationPlayerClient& client) {
+  if (client.compositorPlayer())
+    animation_timeline_->AttachPlayer(
+        static_cast<WebCompositorAnimationPlayerImpl*>(
+            client.compositorPlayer())->animation_player());
+}
+
+void WebCompositorAnimationTimelineImpl::playerDestroyed(
+    const blink::WebCompositorAnimationPlayerClient& client) {
+  if (client.compositorPlayer())
+    animation_timeline_->DetachPlayer(
+        static_cast<WebCompositorAnimationPlayerImpl*>(
+            client.compositorPlayer())->animation_player());
+}
+
+}  // namespace cc_blink