Hold SkTypeface in a RefPtr in FontPlatformDataHarfBuzz.

This allows removal of refcounting code which is implicit when a smart
pointer is used.

Constructing a RefPtr with -1 is problematic (attempting to call ref()
on it will not work), so the hash table deleted implementation was
changed to use a separate boolean member. This
simplifies the code for this somewhat.

BUG=254509

Review URL: https://chromiumcodereview.appspot.com/19770010

git-svn-id: svn://svn.chromium.org/blink/trunk@154688 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove the MathML stylesheet

We removed support for MathML but left the stylesheet which should
be pretty much dead code by now.

Review URL: https://chromiumcodereview.appspot.com/19734005

git-svn-id: svn://svn.chromium.org/blink/trunk@154689 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Mark compositing/iframes/iframe-content-flipping as flaky in Debug

BUG=263120
R=cbiesinger@chromium.org

Review URL: https://codereview.chromium.org/19663012

git-svn-id: svn://svn.chromium.org/blink/trunk@154690 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Rebaseline fast/dom/HTMLProgressElement/progress-element.html

Chromium CL https://chromiumcodereview.appspot.com/19682002 changed the
expected rendering for progress elements

TBR=zturner@chromium.org
BUG=176221

Review URL: https://codereview.chromium.org/19875004

git-svn-id: svn://svn.chromium.org/blink/trunk@154692 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Revert last week's OrderIterator changes

The original change (https://chromiumcodereview.appspot.com/18162016)
has created several regressions and it seems that the approach could
be improved so reverting for now to dig deeper.

TBR=ojan@chromium.org,cbiesinger@chromium.org

Review URL: https://codereview.chromium.org/19661006

git-svn-id: svn://svn.chromium.org/blink/trunk@154693 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Add Florin Malita as a Source/core OWNER

Florin has enough support, lets make it true!

NOTRY=true

Review URL: https://chromiumcodereview.appspot.com/19807006

git-svn-id: svn://svn.chromium.org/blink/trunk@154694 bbb929c8-8fbe-4397-9dbb-9b2b20218538