'virtual/threaded/compositing/visibility/visibility-simple-video-layer.html' is flaky.

http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=virtual%2Fthreaded%2Fcompositing%2Fvisibility%2Fvisibility-simple-video-layer.html for details.

BUG=326524
TBR=vollick
NOTRY=true

Review URL: https://codereview.chromium.org/98403004

git-svn-id: svn://svn.chromium.org/blink/trunk@163348 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Make arguments to Node methods non-optional

http://dom.spec.whatwg.org/#interface-node

Only touch methods defined by the above spec.

The added missing-arguments test passes in Firefox Nightly, IE11
Release Preview and Opera 12.16, so there ought to be fairly little
Web content depending on the old behavior.

BUG=325922

Review URL: https://codereview.chromium.org/103613005

git-svn-id: svn://svn.chromium.org/blink/trunk@163349 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Add a UseCounter for weirdness around string results of 'javascript:' navigations.

R=jochen@chromium.org

Review URL: https://codereview.chromium.org/108143002

git-svn-id: svn://svn.chromium.org/blink/trunk@163350 bbb929c8-8fbe-4397-9dbb-9b2b20218538