Revert 233774 "Make WindowAndroid constructor takes context as p..."

It broke content_browsertests

> Make WindowAndroid constructor takes context as param.
> 
> BUG=309104
> TBR=yfriedman
> 
> Review URL: https://codereview.chromium.org/29303004

TBR=michaelbai@chromium.org

Review URL: https://codereview.chromium.org/66503005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234046 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 234046