Add standard way to indicate GM is GPU-only.

gm/convexpolyeffect.cpp

 
 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 // This test only works with the GPU backend.
 
@@ skipping 77 matching lines @@
         fRects.addToTail(SkRect::MakeLTRB(5.5f, .05f, 29.5f, .25f));
         // small in x and y
         fRects.addToTail(SkRect::MakeLTRB(5.05f, .55f, 5.45f, .85f));
         // inverted in x and y
         fRects.addToTail(SkRect::MakeLTRB(100.f, 50.5f, 5.f, 0.5f));
     }
 
     void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         GrRenderTarget* rt = canvas->internal_private_accessTopLayerRenderTarget();
         if (NULL == rt) {
+            this->drawGpuOnlyMessage(canvas);
             return;
         }
         GrContext* context = rt->getContext();
         if (NULL == context) {
             return;
         }
 
         SkScalar y = 0;
         for (SkTLList<SkPath>::Iter iter(fPaths, SkTLList<SkPath>::Iter::kHead_IterStart);
              iter.get();
@@ skipping 117 matching lines @@
     SkTLList<SkPath> fPaths;
     SkTLList<SkRect> fRects;
 
     typedef GM INHERITED;
 };
 
 DEF_GM( return SkNEW(ConvexPolyEffect); )
 }
 
 #endif