[VMC] - Teapot and Framerate counter do not appear on the WebGL+CSS test...

... site on Chrome dev.

https://code.google.com/p/chromium/issues/detail?id=259817

Fixed mismatched uniform precisions between vertex and fragment shaders causing demos to fail to load in Chrome on Windows. The conformance test glsl/misc/shader-with-global-variable-precision-mismatch.html (currently failing on some platforms in Chrome) already covers this case.