GitLab

Map glDiscardFramebufferEXT to glInvalidateFramebuffer on OpenGL ES
3.0. Both entry points have the same functionality; just the name was
changed between EXT_framebuffer_discard and ES 3.0.

BUG=274334

Review URL: https://chromiumcodereview.appspot.com/23855003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@221440 0039d316-1c4b-4281-b951-d872f2087c98