Use EXT_direct_state_access for path matrix manipulation

Use EXT_direct_state_access for path matrix manipulation

Use EXT_direct_state_access for path matrix manipulation when using
NV_path_rendering extension. This makes Chromium command buffer
integration easier, since the current matrix mode does not need to be
exposed as state and fewer function calls and enums are needed.

BUG=chromium:344330
Committed: http://code.google.com/p/skia/source/detail?r=14374

[Kimmo Kinnunen, 2014-04-23 12:42:39]

Depends on:
https://codereview.chromium.org/212753002

[bsalomon, 2014-04-23 15:08:26]

lgtm

[Kimmo Kinnunen, 2014-04-25 05:47:59]

The CQ bit was checked by kkinnunen@nvidia.com

[commit-bot: I haz the power, 2014-04-25 05:48:18]

CQ is trying da patch. Follow status at
https://skia-tree-status.appspot.com/cq/kkinnunen@nvidia.com/245963009/1

[commit-bot: I haz the power, 2014-04-25 06:21:42]

Change committed as 14374