Revert of Revert of Enable OrientationEvent only for android. (https://codereview.chromium.org/130053005/)

Reason for revert:
Fixed the original issue and tested content_shell to load and pass orientation test case. https://codereview.chromium.org/141303002/. 

Original issue's description:
> Revert of Enable OrientationEvent only for android. (https://codereview.chromium.org/131913003/)
> 
> Reason for revert:
> Causes crashes on Android on loading a web page, more details in https://code.google.com/p/chromium/issues/detail?id=335258 
> 
> Original issue's description:
> > Enable OrientationEvent only for android.
> > 
> > BUG=181136, 331337
> > 
> > Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=245210
> 
> TBR=darin@chromium.org,mahesh.kk@samsung.com
> NOTREECHECKS=true
> NOTRY=true
> BUG=181136, 331337
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=245310

TBR=darin@chromium.org,thakis@chromium.org,estade@chromium.org,mariakhomenko@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=181136, 331337

Review URL: https://codereview.chromium.org/133173004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245545 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245545