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

src/gpu/effects/GrConvexPolyEffect.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrConvexPolyEffect_DEFINED
 #define GrConvexPolyEffect_DEFINED
 
@@ skipping 39 matching lines @@
     static GrEffectRef* Create(EdgeType edgeType, int n, const SkScalar edges[]) {
         if (n <= 0 || n > kMaxEdges) {
             return NULL;
         }
         return CreateEffectRef(AutoEffectUnref(SkNEW_ARGS(GrConvexPolyEffect,
                                                           (edgeType, n, edges))));
     }
 
     /**
      * 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();
 
     static const char* Name() { return "ConvexPoly"; }
 
     EdgeType getEdgeType() const { return fEdgeType; }
 
     int getEdgeCount() const { return fEdgeCount; }
 
     const SkScalar* getEdges() const { return fEdges; }
@@ skipping 13 matching lines @@
     int      fEdgeCount;
     SkScalar fEdges[3 * kMaxEdges];
 
     GR_DECLARE_EFFECT_TEST;
 
     typedef GrEffect INHERITED;
 };
 
 
 #endif