Make the update frequency for sheriff-o-matic 30 seconds again.

Now that the server has been fixed, we should be able to update more
frequently without hitting our spending limit.

Also, only do updates on requestAnimationFrame. That way, background
tabs won't do unnecessary updates. This does mean that when you focus
the tab it will update right then, but I think that's OK.

NOTRY=true

Review URL: https://codereview.chromium.org/483523002

git-svn-id: svn://svn.chromium.org/blink/trunk@180622 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Oilpan: Compile error with GYP_DEFINES='gc_profile_marking=1'

1. change the ENABLE(GC_TRACING) to ENABLE(GC_PROFILE_MARKING).

R=ager@chromium.org, oilpan-reviews@chromium.org
BUG=405009

Review URL: https://codereview.chromium.org/466363003

git-svn-id: svn://svn.chromium.org/blink/trunk@180623 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove m_isContextElement

r180614 forgot to remove m_isContextElement.

Review URL: https://codereview.chromium.org/488013002

git-svn-id: svn://svn.chromium.org/blink/trunk@180625 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Improve styling of builder links in sheriff-o-matic.

-Put each link on it's own line.
-Make them look like normal links.
No special font-size and leave the underline.

TBR=leviw@chromium.org

Review URL: https://codereview.chromium.org/486203007

git-svn-id: svn://svn.chromium.org/blink/trunk@180626 bbb929c8-8fbe-4397-9dbb-9b2b20218538