CC AnimationHost: Fix LinkHighlights detach scope.

content/test/web_layer_tree_view_impl_for_testing.cc

Index: content/test/web_layer_tree_view_impl_for_testing.cc
diff --git a/content/test/web_layer_tree_view_impl_for_testing.cc b/content/test/web_layer_tree_view_impl_for_testing.cc
index 8b07ba26e9cc11f7ad4c170070c3cda8b196c9a0..a70aa245306638f9dfa4cc9c089f5a415844edea 100644
--- a/content/test/web_layer_tree_view_impl_for_testing.cc
+++ b/content/test/web_layer_tree_view_impl_for_testing.cc
@@ -8,7 +8,10 @@
 #include "base/strings/string_number_conversions.h"
 #include "base/synchronization/lock.h"
 #include "base/thread_task_runner_handle.h"
+#include "cc/animation/animation_host.h"
+#include "cc/animation/animation_timeline.h"
 #include "cc/base/switches.h"
+#include "cc/blink/web_compositor_animation_timeline_impl.h"
 #include "cc/blink/web_layer_impl.h"
 #include "cc/input/input_handler.h"
 #include "cc/layers/layer.h"
@@ -58,6 +61,26 @@ void WebLayerTreeViewImplForTesting::clearRootLayer() {
   layer_tree_host_->SetRootLayer(scoped_refptr<cc::Layer>());
 }
 
+void WebLayerTreeViewImplForTesting::attachCompositorAnimationTimeline(
+    blink::WebCompositorAnimationTimeline* compositor_timeline) {
+  DCHECK(compositor_timeline);
+  DCHECK(layer_tree_host_->animation_host());
+  layer_tree_host_->animation_host()->AddAnimationTimeline(
+      static_cast<const cc_blink::WebCompositorAnimationTimelineImpl*>(
+          compositor_timeline)
+          ->animation_timeline());
+}
+
+void WebLayerTreeViewImplForTesting::detachCompositorAnimationTimeline(
+    blink::WebCompositorAnimationTimeline* compositor_timeline) {
+  DCHECK(compositor_timeline);
+  DCHECK(layer_tree_host_->animation_host());
+  layer_tree_host_->animation_host()->RemoveAnimationTimeline(
+      static_cast<const cc_blink::WebCompositorAnimationTimelineImpl*>(
+          compositor_timeline)
+          ->animation_timeline());
+}
+
 void WebLayerTreeViewImplForTesting::setViewportSize(
     const WebSize& unused_deprecated,
     const WebSize& device_viewport_size) {