Remove WebAudioSourceProvider.h from public/web.

This is a two side patch and the Chromium side has to be landed first.

BUG=None
TEST=None
R=abarth@chromium.org

Review URL: https://codereview.chromium.org/26168002

git-svn-id: svn://svn.chromium.org/blink/trunk@159232 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove invalid test two-properties-in-keyframed-animation

This test is no longer valid, since filter and transform are both
accelerated.

R=vollick@chromium.org
BUG=None

Review URL: https://codereview.chromium.org/26696002

git-svn-id: svn://svn.chromium.org/blink/trunk@159233 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Add logs to XMLHttpRequest to ease debugging.

In debugging complicated XHR bugs, it's important to understand sequence
of method calls and state transition. I want to upstream simple logs at the
head of each method implementations and loader delegate methods I'm regularly
putting for debugging.

BUG=

Review URL: https://codereview.chromium.org/26231002

git-svn-id: svn://svn.chromium.org/blink/trunk@159234 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DOMTokenList: Make sure we do not add the same token twice

In case we do element.classList.add('a', 'a') we need to ensure that we
do not add the same token twice.

http://dom.spec.whatwg.org/#dom-domtokenlist-add

BUG=232448
R=tkent

Review URL: https://codereview.chromium.org/25750002

git-svn-id: svn://svn.chromium.org/blink/trunk@159235 bbb929c8-8fbe-4397-9dbb-9b2b20218538