Use D3D compiler optimization level 3.
Use D3D compiler optimization level 3.

The is to try and fix some three.js lighting issues. It appears optimization level 0 has a loop unrolling bug. The compiler returns success but the shader does not work. All other optimization levels work. http://crbug.com/153105.

Repro here:

http://alteredqualia.com/tmp/tests/angle-issues/webgl_materials_normalmap_test.html

Both heads should look the same.
Review URL: https://codereview.appspot.com/6821060

git-svn-id: 2a1ef23f1c4b6a1dbccd5f9514022461535c55c0@1465 736b8ea6-26fd-11df-bfd4-992fa37f6226

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