Refactoring to introduce refcount to WebMediaPlayerImpl
WebMediaPlayerImpl interacts with multiple threads that it
becomes necessary to make it refcounted so we can post task
on different threads' message loop.

Review URL: http://codereview.chromium.org/147225

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@20038 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed