Reland of change all factories to return their base-class

samplecode/SampleTiling.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SampleCode.h"
 #include "SkView.h"
 #include "SkCanvas.h"
@@ skipping 37 matching lines @@
 }
 
 static const SkColorType gColorTypes[] = {
     kN32_SkColorType,
     kRGB_565_SkColorType,
 };
 static const int gWidth = 32;
 static const int gHeight = 32;
 
 class TilingView : public SampleView {
-    SkAutoTUnref<SkPicture>        fTextPicture;
-    SkAutoTUnref<SkBlurDrawLooper> fLooper;
+    SkAutoTUnref<SkPicture>     fTextPicture;
+    SkAutoTUnref<SkDrawLooper>  fLooper;
 public:
     TilingView()
             : fLooper(SkBlurDrawLooper::Create(0x88000000,
                                                SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(1)),
                                                SkIntToScalar(2), SkIntToScalar(2))) {
         for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypes); i++) {
             makebm(&fTexture[i], gColorTypes[i], gWidth, gHeight);
         }
     }
 
@@ skipping 92 matching lines @@
     }
 
 private:
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new TilingView; }
 static SkViewRegister reg(MyFactory);