Revert 245772 "content_gl_tests were failing because, we are che..."

Caused assertion failures in content_gl_tests on all debug GPU bots.

> content_gl_tests were failing because, we are checking for rgb565 platform support
> on hardware and failing intentionally, which was not correct, the test should be skiped instead. This patch takes care of that along with the base patch.
> On Aura with Nvidiea drivers the support is not there, so the test fails previously now weare skipping it by displaying the reason.
> Android the support gets passed.
> 
> 
> BUG=323150
> 
> Review URL: https://codereview.chromium.org/133363004

TBR=siva.gunturi@samsung.com

Review URL: https://codereview.chromium.org/142413002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245790 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245790