Revert 236034 "Incorporating logging into Cast: "

> Incorporating logging into Cast: 
> 1. Adding logging to CastEnvironment.
> 2. Actually triggering logging within the cast library.
> 3. Adding thread checks.
> 4. Removing trace calls outside of the logging class.
> 
> Open issues: 
> 1.Use of rtp_timestamp and frame id is not consistent.
> In addition, the AudioBus does not include these values.
> 2. There is a pending cl to switch frame_id to int. This cl does not include that.
> 3. There are a few more places to add logging.
> 
> As this cl is already big enough, all of the above will come in a follow-up cl.
> 
> Review URL: https://codereview.chromium.org/69603002

TBR=mikhal@google.com

Review URL: https://codereview.chromium.org/72143003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236036 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236036