Remove Internals::numberOfActiveAnimations

The Internals interface numberOfActiveAnimations is no longer needed
as we now have AnimationTimeline::getAnimationPlayers.

I've tweaked the values in the webkit-clip-path-equality.html test as
currently it uses 0px for the center values but cssText returns this
as 0%.

Review URL: https://codereview.chromium.org/399843006

git-svn-id: svn://svn.chromium.org/blink/trunk@178609 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Range.compareBoundaryPoints should throw a NotSupportedError when how has not expected value

SPEC: http://dom.spec.whatwg.org/#dom-range-compareboundarypoints

This CL also added interface type checking so appropriate TypeError will be thrown.
In addition, 714 failed cases will be passed in
http://w3c-test.org/dom/ranges/Range-compareBoundaryPoints.html

TEST=LayoutTests/fast/dom/Range/compareBoundaryPoints-error.html

Behavior in other browsers.
*)FF: PASS
*)IE: FAIL

Review URL: https://codereview.chromium.org/405083003

git-svn-id: svn://svn.chromium.org/blink/trunk@178610 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Auto-rebaseline for r178532

http://src.chromium.org/viewvc/blink?view=revision&revision=178532

BUG=391662
TBR=chrishtr@chromium.org

Review URL: https://codereview.chromium.org/402343002

git-svn-id: svn://svn.chromium.org/blink/trunk@178611 bbb929c8-8fbe-4397-9dbb-9b2b20218538