Turn on quilt mode in DM.

gm/shallowgradient.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 "SkGradientShader.h"
 
@@ skipping 24 matching lines @@
                                          colors, NULL, count);
 }
 
 class ShallowGradientGM : public skiagm::GM {
 public:
     ShallowGradientGM(MakeShaderProc proc, const char name[]) : fProc(proc) {
         fName.printf("shallow_gradient_%s", name);
     }
 
 protected:
+    virtual uint32_t onGetFlags() const SK_OVERRIDE {
+        if (fName.contains("linear") || fName.contains("radial")) {
+            return kSkipTiled_Flag;
+        }
+        return 0;
+    }
+
     virtual SkString onShortName() SK_OVERRIDE {
         return fName;
     }
 
     virtual SkISize onISize() SK_OVERRIDE {
         return SkISize::Make(800, 800);
     }
 
     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         const SkColor colors[] = { 0xFF555555, 0xFF444444 };
@@ skipping 13 matching lines @@
 
     typedef skiagm::GM INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 DEF_GM( return new ShallowGradientGM(shader_linear, "linear"); )
 DEF_GM( return new ShallowGradientGM(shader_radial, "radial"); )
 DEF_GM( return new ShallowGradientGM(shader_conical, "conical"); )
 DEF_GM( return new ShallowGradientGM(shader_sweep, "sweep"); )