Merged EXT_frag_depth changes into dx11proto branch

Merged EXT_frag_depth changes into dx11proto branch

BUG=429

Committed: https://code.google.com/p/angleproject/source/detail?r=2419

[Brandon Jones, 2013-05-29 19:05:28]

This is a pretty straightforward merge of
https://codereview.appspot.com/9827044/ but unfortunately I haven't been able to
test it thoroughly since Chromium does not appear to build against the DX11
branch. Is this expected?

[nicolas%transgaming.com, 2013-05-29 20:37:58]

On 2013/05/29 19:05:28, Brandon Jones wrote:
> This is a pretty straightforward merge of
> https://codereview.appspot.com/9827044/ but unfortunately I haven't been able
to
> test it thoroughly since Chromium does not appear to build against the DX11
> branch. Is this expected?

You can do a stand-alone build using the Visual Studio solution file. Just
replace Chrome's libEGL.dll and libGLESv2.dll with the newly built ones. To test
the DX11 path, make sure to set ANGLE_ENABLE_D3D11 to 1 in
src/libGLESv2/renderer/Renderer.cpp

[Brandon Jones, 2013-05-30 17:55:28]

Tested now with both the DX9 and DX11 paths. Had to fix a minor issue with the
DX11 shader output but at this point it's working across the board.

[nicolas%transgaming.com, 2013-05-31 03:23:46]

Looks great.

[Brandon Jones, 2013-05-31 16:45:16]

Committed patchset #2 manually as r2419 (presubmit successful).