Remove TextTrackResource

It's now just a RawResource, so use that instead.

BUG=312756

Review URL: https://codereview.chromium.org/52563002

git-svn-id: svn://svn.chromium.org/blink/trunk@160974 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Create a HTMLUnknownElement when using createElement('image')

BUG=305773

Review URL: https://codereview.chromium.org/37513002

git-svn-id: svn://svn.chromium.org/blink/trunk@160975 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Mark fast/js/JSON-stringify.html as flaky.

Started after V8 roll to version 3.22.23.

TBR=yurys@chromium.org
BUG=306929

Review URL: https://codereview.chromium.org/53573002

git-svn-id: svn://svn.chromium.org/blink/trunk@160976 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Editing should not create CSSOM wrappers.

Change EditingStyle to grab the list of StyleRules directly
instead of the list of CSSRules. This means we don't do the
work of creating the CSSOMWrappers and finding their appropriate
stylesheet.

Extending the existing naming convention of having CSSRule be
the CSSOMWrapper and StyleRule be the non-wrapped rule.

Review URL: https://codereview.chromium.org/52093005

git-svn-id: svn://svn.chromium.org/blink/trunk@160977 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Fix LayoutTest transitions/zero-duration-with-non-zero-delay-start.html

When a transition has zero duration but non-zero delay, the it should wait for
the delay time to elapse, then transition instantaneously. Both the legacy and
Web Animations transitions implentations respect this. This is confirmed by
running this test in real-time mode in content_shell.

However, the testing pause API (used in non-real-time mode) for the legacy
implementation does not account for start delay. The existing expected result
for this test used 'incorrect' values to account for this, causing the test to
pass in non-real-time mode, but fail in real-time-mode.

This change updates the expected result to use the correct values. It therefore
fails in non-real-time-mode with the legacy implementation. It also makes the
test itself a little more robust.

R=timloh@chromium.org

Review URL: https://codereview.chromium.org/47743014

git-svn-id: svn://svn.chromium.org/blink/trunk@160978 bbb929c8-8fbe-4397-9dbb-9b2b20218538