added support for PLS path rendering

src/gpu/gl/builders/GrGLProgramBuilder.h

Index: src/gpu/gl/builders/GrGLProgramBuilder.h
diff --git a/src/gpu/gl/builders/GrGLProgramBuilder.h b/src/gpu/gl/builders/GrGLProgramBuilder.h
index 70cfad5633ec652417cc6e42cae2b5c1e09f37c1..570d40bcaf9dcef35fc4644eb0c04aaa0672f564 100644
--- a/src/gpu/gl/builders/GrGLProgramBuilder.h
+++ b/src/gpu/gl/builders/GrGLProgramBuilder.h
@@ -88,10 +88,11 @@ private:
     void emitAndInstallProc(const GrPrimitiveProcessor&,
                             const char* outColor,
                             const char* outCoverage);
-    void emitAndInstallXferProc(const GrXferProcessor&,
-                                const GrGLSLExpr4& colorIn,
-                                const GrGLSLExpr4& coverageIn,
-                                bool ignoresCoverage);
+    virtual void emitAndInstallXferProc(const GrXferProcessor&,

[egdaniel, 2016/01/13 21:47:19]

why was this made virtual?

[ethannicholas, 2016/01/20 17:51:05]

Had needed it at one point, failed to remove the virtual when that changed.
Fixed!

+                                        const GrGLSLExpr4& colorIn,
+                                        const GrGLSLExpr4& coverageIn,
+                                        bool ignoresCoverage,
+                                        GrPixelLocalStorageState plsState);
     void emitFSOutputSwizzle(bool hasSecondaryOutput);
 
     void verify(const GrPrimitiveProcessor&);