Remove pthread_getspecific_direct code.

We were never using and half-removed it already. It also relies on internal
APIs and an internal header where OS X's libc effectively special-cases their
WebKit.

BUG=none

Review URL: https://codereview.chromium.org/29693006

git-svn-id: svn://svn.chromium.org/blink/trunk@160244 bbb929c8-8fbe-4397-9dbb-9b2b20218538
cloneNode: Change the default value back to false

This reverts the revert done in
commit 45c50f19df78c69e26ca3c98854bbf35ebc51004.

We used to use false as the default value for cloneNode. It was
recently changed to default to true to match the DOM spec. However, the
DOM spec was changed back to use false as the default value.

This should be safe because until recently Firefox threw exceptions
if no argument was passed. IE11, WebKit, Presto and Chrome
(before r153733, July) uses false as the default.

BUG=309628
TBR=lushnikov@chromium.org

Review URL: https://codereview.chromium.org/35693002

git-svn-id: svn://svn.chromium.org/blink/trunk@160245 bbb929c8-8fbe-4397-9dbb-9b2b20218538