Revert of Revert of Enable OrientationEvent only for android.

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
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=245545

[maheshkk, 2014-01-17 17:32:05]

Created Revert of Revert of Enable OrientationEvent only for android.

[commit-bot: I haz the power, 2014-01-17 17:32:24]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a lowly provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[maheshkk, 2014-01-17 17:32:58]

On 2014/01/17 17:32:05, maheshkk wrote:
> Created Revert of Revert of Enable OrientationEvent only for android.

Is this the way we revert a revert? or Shall I submit a new patch? 
Please review.

[Nico, 2014-01-17 17:33:32]

On 2014/01/17 17:32:58, maheshkk wrote:
> On 2014/01/17 17:32:05, maheshkk wrote:
> > Created Revert of Revert of Enable OrientationEvent only for android.
> 
> Is this the way we revert a revert? or Shall I submit a new patch? 
> Please review.

lgtm

[commit-bot: I haz the power, 2014-01-17 17:35:45]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/mahesh.kk@samsung.com/133173004/1

[commit-bot: I haz the power, 2014-01-17 17:36:07]

Change committed as 245545