Alter Default & Software path renderers to better handle AA hairline paths

src/gpu/GrSoftwarePathRenderer.cpp

Index: src/gpu/GrSoftwarePathRenderer.cpp
diff --git a/src/gpu/GrSoftwarePathRenderer.cpp b/src/gpu/GrSoftwarePathRenderer.cpp
index d0936d6b28a37427b31d0b66cda1dc7138dfccdd..bca2c66b37f82614f44660b21fed9d72cb97f00d 100644
--- a/src/gpu/GrSoftwarePathRenderer.cpp
+++ b/src/gpu/GrSoftwarePathRenderer.cpp
@@ -15,13 +15,7 @@ bool GrSoftwarePathRenderer::canDrawPath(const SkPath&,
                                          const SkStrokeRec&,
                                          const GrDrawTarget*,
                                          bool antiAlias) const {
-    if (!antiAlias || NULL == fContext) {

[robertphillips, 2014/07/24 17:18:59]

Note that SW path rendering now only ever appears last so this change won't be
stealing work away from the default path renderer.

-        // TODO: We could allow the SW path to also handle non-AA paths but
-        // this would mean that GrDefaultPathRenderer would never be called
-        // (since it appears after the SW renderer in the path renderer
-        // chain). Some testing would need to be done r.e. performance
-        // and consistency of the resulting images before removing
-        // the "!antiAlias" clause from the above test
+    if (NULL == fContext) {
         return false;
     }