Added preprocessor support for GL_FRAGMENT_PRECISION_HIGH.
I will send the tests in a separate patch because I need to refactor the way compiler_tests are setup.
Review URL: https://codereview.appspot.com/7402051

git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1990 736b8ea6-26fd-11df-bfd4-992fa37f6226
9 files changed