Make AutomationProvider RefCountedThreadSafe instead of RefCounted
We are calling AddRef/Release from multiple threads, and just
RefCounted is very dangerous.
This change also ensures AutomationProvider is always
constructed and destroyed on the same thread: UI.
There might be other issues caused by running dtor
on the wrong thread.
BUG=71066, 71456
TEST=none
Review URL: http://codereview.chromium.org/6347065
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@73328 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed
