Change the glGetShaderPrecisionFormat emulated values.
Change the glGetShaderPrecisionFormat emulated values.

The current returned values are wrong, so they fail the WebGL conformance test.

BUG=
TEST=shader-precision-format.html
R=gman
Review URL: https://chromiumcodereview.appspot.com/10024040

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@131465 0039d316-1c4b-4281-b951-d872f2087c98

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