Add convex polygon rendering effect and GM to test it.

gm/beziereffects.cpp

Index: gm/beziereffects.cpp
diff --git a/gm/beziereffects.cpp b/gm/beziereffects.cpp
index c33674caad726da9a3cd30f044e8a418fc164a5d..b35c4f96f4606ec7d370a48410413c035f2e7f61 100644
--- a/gm/beziereffects.cpp
+++ b/gm/beziereffects.cpp
@@ -23,7 +23,7 @@
 
 // Position & KLM line eq values. These are the vertex attributes for Bezier curves. The last value
 // of the Vec4f is ignored.
-extern const GrVertexAttrib kAttribs[] = {
+static const GrVertexAttrib kAttribs[] = {

[bsalomon, 2014/01/29 20:18:30]

I think this will break some compilers because it is used as a template arg. Try
runs will find out...

[robertphillips, 2014/01/29 20:57:55]

Yep - I seem to recall the extern was required.

     {kVec2f_GrVertexAttribType, 0, kPosition_GrVertexAttribBinding},
     {kVec4f_GrVertexAttribType, sizeof(GrPoint), kEffect_GrVertexAttribBinding}
 };