Pre-compute ViewFactory linking checks

[jbdeboer]

The following line came up hot in a profile of the TreeComponent benchmark.

https://github.com/angular/angular.dart/blob/c21ac7eaec3fd15bba7a124fdfb3e9680092a0f2/lib/core_dom/tagging_view_factory.dart#L72

The call to Element.classes.contains() involves an expensive HashMap and should be avoided.

Since the nodeList is generally a clone of the template nodes, we can pre-compute this check in the Compiler and pass it in with the templateNodes.

In fact, we could go further and pre-compute other checks as well:

• whether or not the node has a parentNode
• if the node is an Element or a Text / Comment node
• if the node has any children .ng-binding elements (if not, we can skip the querySelectorAll check