Proposed fix to new stroking/path render selection system

Proposed fix to new stroking/path render selection system

[robertphillips, 2013-01-07 23:57:10]

I believe this fixes the Xoom errors. The only change from Alexis' original CL
is at line 1110 where I have split the test for the NULL PR and hairlines and
nested the hairline test. The problem is/was that the initial PR search failed
but the path was a hairline so it never got a shot at getting a software path
renderer. Note that shader derivatives aren't supported on the Xoom which can
disable the convex and hairline path renderers.

[sugoi1, 2013-01-08 13:40:45]

lgtm

[sugoi1, 2013-01-08 13:40:58]

https://codereview.appspot.com/7075043/diff/1/src/gpu/GrContext.cpp
File src/gpu/GrContext.cpp (right):

https://codereview.appspot.com/7075043/diff/1/src/gpu/GrContext.cpp#newcode1119
src/gpu/GrContext.cpp:1119: pr = this->getPathRenderer(*pathPtr, strokeRec,
target, true, type);
Ah, it all makes sense now, the first call doesn't allow software rendering and
the 2nd one does, so software rendered hairline was now impossible. Good catch !

[robertphillips, 2013-01-08 13:46:00]

committed as r7076