Make GMs aware of what tool they're being run in.

src/gpu/effects/GrConvexPolyEffect.h

Index: src/gpu/effects/GrConvexPolyEffect.h
diff --git a/src/gpu/effects/GrConvexPolyEffect.h b/src/gpu/effects/GrConvexPolyEffect.h
index 035d9e95dda03c4a5e3f014399625f8788fcfd2b..225e729242a339a22094080cb7f61a4ea0043977 100644
--- a/src/gpu/effects/GrConvexPolyEffect.h
+++ b/src/gpu/effects/GrConvexPolyEffect.h
@@ -57,9 +57,10 @@ public:
 
     /**
      * Creates an effect that clips against the path. If the path is not a convex polygon, is
-     * inverse filled, or has too many edges, this will return NULL.
+     * inverse filled, or has too many edges, this will return NULL. If offset is non-NULL, then
+     * the path is translated by the vector.
      */
-    static GrEffectRef* Create(EdgeType, const SkPath&);
+    static GrEffectRef* Create(EdgeType, const SkPath&, const SkVector* offset= NULL);
 
     virtual ~GrConvexPolyEffect();