Revert 170701 since the WebKit change has now been rolled in again.

Revert 170701 since the WebKit change has now been rolled in again.

> Revert 170668
> Needs to revert this because its WebKit patch was unrolled.
> (See r136319, unreviewed, rolling out r136236).
> > Update the Speech Api to support array(s) of result items
> > instead of a single item at a time.
> > 
> > BUG=143124
> > TEST=Covered by content_unittests
> > 
> > Review URL: https://chromiumcodereview.appspot.com/11421103
> 
> TBR=tommi@chromium.org
> Review URL: https://codereview.chromium.org/11416310

TBR=tasak@google.com
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=170920