Revert 179213 "Oilpan: Convert some Resource raw pointer members..."

This CL caused a lot of crashes in webkit_unit_tests in oilpan bots:

http://build.chromium.org/p/chromium.webkit/builders/WebKit%20Mac%20Oilpan%20%28dbg%29/builds/4024

> Oilpan: Convert some Resource raw pointer members to Member<> or Persistent<>.
> 
> BUG=393516
> 
> Review URL: https://codereview.chromium.org/416203003

TBR=tkent@chromium.org

Review URL: https://codereview.chromium.org/432623002

git-svn-id: svn://svn.chromium.org/blink/trunk@179268 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Add MediaKeySession.closed attribute

This attribute returns a promise that is resolved with undefined when
the session is closed.

BUG=358271
TEST=new layout test passes

Review URL: https://codereview.chromium.org/398583005

git-svn-id: svn://svn.chromium.org/blink/trunk@179269 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Move Node::isBlockFlowElement() to htmlediting.h

Move Node::isBlockFlowElement() to htmlediting.h as this is specific to
editing.

R=leviw@chromium.org

Review URL: https://codereview.chromium.org/416393005

git-svn-id: svn://svn.chromium.org/blink/trunk@179270 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove unnecessary call to containingBlock in RenderLayerModelObject::styleDidChange

We already check parent(). There's no need to check whether we have a containing block.

R=esprehn@chromium.org

Review URL: https://codereview.chromium.org/436443002

git-svn-id: svn://svn.chromium.org/blink/trunk@179271 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove old attributes from AudioParam

The following attributes of AudioParam are no longer part of the
WebAudio spec and should be removed: minValue, maxValue, name, units.

See http://webaudio.github.io/web-audio-api/#idl-def-AudioParam

Update delaynode test since it checked the values of minValue and
maxValue.

BUG=396910
TESTS=No change in behavior except for incorrect delaynode test.

Review URL: https://codereview.chromium.org/417853002

git-svn-id: svn://svn.chromium.org/blink/trunk@179272 bbb929c8-8fbe-4397-9dbb-9b2b20218538