Draft change to start pulling uniform color into GP

src/gpu/gl/GrGLProgram.h

Index: src/gpu/gl/GrGLProgram.h
diff --git a/src/gpu/gl/GrGLProgram.h b/src/gpu/gl/GrGLProgram.h
index ea8be85251c6bcfaf3e98218a80cb981fee41117..1f6d922505d1b3f49209a26a50df066199f96ecd 100644
--- a/src/gpu/gl/GrGLProgram.h
+++ b/src/gpu/gl/GrGLProgram.h
@@ -152,10 +152,6 @@ protected:
     // per-vertex colors.
     void setColor(const GrOptDrawState&, GrColor color);
 
-    // Helper for setData(). Makes GL calls to specify the initial coverage when there is not
-    // per-vertex coverages.
-    void setCoverage(const GrOptDrawState&, uint8_t coverage);
-
     // A templated helper to loop over effects, set the transforms(via subclass) and bind textures
     void setFragmentData(const GrOptDrawState&);
     virtual void setTransformData(const GrPendingFragmentStage&, GrGLInstalledFragProc*);