change all factories to return their base-class

gm/circles.cpp

 
 /*
  * Copyright 2012 Intel 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 "SkBlurDrawLooper.h"
 #include "SkBlurMask.h"
@@ skipping 63 matching lines @@
                                                      SK_ARRAY_COUNT(colors),
                                                      SkShader::kClamp_TileMode);
         p.setShader(s)->unref();
         fPaints.push_back(p);
         }
 
         {
         // AA with blur
         SkPaint p;
         p.setAntiAlias(true);
-        SkBlurDrawLooper* shadowLooper =
+        SkDrawLooper* shadowLooper =
             SkBlurDrawLooper::Create(SK_ColorBLUE,
                                      SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(10)),
                                      SkIntToScalar(5), SkIntToScalar(10),
                                      SkBlurDrawLooper::kIgnoreTransform_BlurFlag |
                                      SkBlurDrawLooper::kOverrideColor_BlurFlag |
                                      SkBlurDrawLooper::kHighQuality_BlurFlag);
         SkAutoUnref aurL0(shadowLooper);
         p.setLooper(shadowLooper);
         fPaints.push_back(p);
         }
@@ skipping 115 matching lines @@
     SkTArray<SkPaint> fPaints;
     SkTArray<SkMatrix> fMatrices;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static GM* MyFactory(void*) { return new CircleGM; }
 static GMRegistry reg(MyFactory);
 
 }