Revert of change all factories to return their base-class

gm/rects.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 "SkBlurDrawLooper.h"
 #include "SkBlurMask.h"
@@ skipping 77 matching lines @@
                                                          SkShader::kClamp_TileMode);
             p.setShader(s)->unref();
             fPaints.push_back(p);
         }
 
         {
             // AA with blur
             SkPaint p;
             p.setColor(SK_ColorWHITE);
             p.setAntiAlias(true);
-            SkDrawLooper* shadowLooper =
+            SkBlurDrawLooper* shadowLooper =
                 SkBlurDrawLooper::Create(SK_ColorWHITE,
                                          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 178 matching lines @@
 
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static GM* MyFactory(void*) { return new RectsGM; }
 static GMRegistry reg(MyFactory);
 
 }