Remove 1d glyph positions from nvpr text

Remove 1d glyph positions from nvpr text

Removes the case for x-only glyph positions from nvpr text, opting to
always send 2d glyph positions instead. The 1d glyph positions saved a
bit on memory bandwidth, but ended up a net loss because they required
more updates to the view matrix. Now we can draw an entire paragraph
without touching the GL state, whereas before we would have to update
the view matrix at every new line.

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/38e13adc18555f8e75f5ae6762e7c307214ae37f

[Chris Dalton, 2014-11-05 22:12:02]

cdalton@nvidia.com changed reviewers:
+ bsalomon@google.com

[Chris Dalton, 2014-11-05 22:12:03]

https://codereview.chromium.org/700283002/diff/20001/src/gpu/GrStencilAndCove...
File src/gpu/GrStencilAndCoverTextContext.h (left):

https://codereview.chromium.org/700283002/diff/20001/src/gpu/GrStencilAndCove...
src/gpu/GrStencilAndCoverTextContext.h:81: void initGlyphs(SkGlyphCache* cache);
This declaration was accidentally left in from an earlier version of the class.
initGlyphs() never gets used or defined.

[bsalomon, 2014-11-06 15:56:50]

lgtm

[Chris Dalton, 2014-11-06 17:30:32]

The CQ bit was checked by cdalton@nvidia.com

[commit-bot: I haz the power, 2014-11-06 17:30:42]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/700283002/20001

[commit-bot: I haz the power, 2014-11-07 14:02:19]

Committed patchset #2 (id:20001) as 38e13adc18555f8e75f5ae6762e7c307214ae37f