Revert of Eliminate the dependence of tts extension API for tts_controller.cc (https://codereview.chromium.org/181123004/)

Reason for revert:
Breakes ChromeVox spoken feedback on OOBE.

Original issue's description:
> Eliminate the dependence of tts extension API for tts_controller.cc
> 
> This is the first patch to move TTS implementation from browser layer
> to content. To move TTS to conent, the direct dependence of browser
> compoent should be eliminated from TTS classes first.
> 
> R=tommi@chromium.org, dmazzoni@chromium.org, sky@chromium.org
> BUG=347045
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=254740

TBR=dmazzoni@chromium.org,tommi@chromium.org,sky@chromium.org,chun.gao@intel.com
NOTREECHECKS=true
NOTRY=true
BUG=347045

Review URL: https://codereview.chromium.org/188633003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255354 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255354