Fix cc scrollbar layer issues with initialization, and use element ids throughout.

third_party/WebKit/Source/web/LinkHighlightImpl.cpp

Index: third_party/WebKit/Source/web/LinkHighlightImpl.cpp
diff --git a/third_party/WebKit/Source/web/LinkHighlightImpl.cpp b/third_party/WebKit/Source/web/LinkHighlightImpl.cpp
index 152fc313c580d8c3eee92fa0c2a8113270e7610a..2e925e6806f2a3b4ac5591758b8479365324d615 100644
--- a/third_party/WebKit/Source/web/LinkHighlightImpl.cpp
+++ b/third_party/WebKit/Source/web/LinkHighlightImpl.cpp
@@ -98,8 +98,9 @@ LinkHighlightImpl::LinkHighlightImpl(Node* node, WebViewBase* owning_web_view)
   if (owning_web_view_->LinkHighlightsTimeline())
     owning_web_view_->LinkHighlightsTimeline()->PlayerAttached(*this);
 
-  CompositorElementId element_id = CreateCompositorElementId(
-      DOMNodeIds::IdForNode(node), CompositorSubElementId::kLinkHighlight);
+  CompositorElementId element_id =
+      CreateCompositorElementId(DOMNodeIds::IdForNode(node),
+                                CompositorElementIdNamespace::kLinkHighlight);
   compositor_player_->AttachElement(element_id);
   content_layer_->Layer()->SetDrawsContent(true);
   content_layer_->Layer()->SetOpacity(1);