Turn on quilt mode in DM.

gm/vertices.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 #include "SkCanvas.h"
 #include "SkGradientShader.h"
@@ skipping 19 matching lines @@
 
 public:
     VerticesGM() : fShader(NULL) {
     }
 
     virtual ~VerticesGM() {
         SkSafeUnref(fShader);
     }
 
 protected:
+    virtual uint32_t onGetFlags() const SK_OVERRIDE {
+        return kSkipTiled_Flag;
+    }
+
     virtual void onOnceBeforeDraw() SK_OVERRIDE {
         const SkScalar X = 150;
         const SkScalar Y = 150;
 
         fPts[0].set(0, 0);      fPts[1].set(X/2, 10);   fPts[2].set(X, 0);
         fPts[3].set(10, Y/2);   fPts[4].set(X/2, Y/2);  fPts[5].set(X-10, Y/2);
         fPts[6].set(0, Y);    fPts[7].set(X/2, Y-10);  fPts[8].set(X, Y);
 
         const SkScalar w = 200;
         const SkScalar h = 200;
@@ skipping 58 matching lines @@
             canvas->translate(0, 200);
             xfer->unref();
         }
     }
 
 private:
     typedef skiagm::GM INHERITED;
 };
 
 DEF_GM( return SkNEW(VerticesGM); )