Partial revert of "GPU: Reduce MakeCurrent calls to fix Orange San Diego"

GPU: Reduce MakeCurrent calls to fix Orange San Diego

We have hit several separate issues resulting from calling
MakeCurrent to change surfaces (when using virtual contexts).

This removes most cases of MakeCurrent that aren't needed,
and enables virtual contexts for Orange San Diego.

Original code review: https://codereview.chromium.org/14069008/

The last remaining case is ReleaseCurrent which isn't needed
for the Orange San Diego fix, and will be done in a follow up CL.

BUG=179250, 229643, 230896
NOTRY=true

Reason for revert:
Flakiness on content_shell tests. Appears to be caused by this change. Example breakage:http://build.chromium.org/p/chromium.linux/buildstatus?builder=Android%20Tests%20%28dbg%29&number=10928

Original cl: https://chromiumcodereview.appspot.com/14069008

TBR=sievers@chromium.org

Review URL: https://codereview.chromium.org/15796002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@201665 0039d316-1c4b-4281-b951-d872f2087c98

0 files changed, 0 insertions, 0 deletions