Reland of change all factories to return their base-class

samplecode/SampleAll.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 "SkBlurMask.h"
 #include "SkCanvas.h"
@@ skipping 364 matching lines @@
             radialRadius, radialColors, radialPos, radialCount,
             radialMode);
 
         SkEmbossMaskFilter::Light light;
         light.fDirection[0] = SK_Scalar1/2;
         light.fDirection[1] = SK_Scalar1/2;
         light.fDirection[2] = SK_Scalar1/3;
         light.fAmbient        = 0x48;
         light.fSpecular        = 0x80;
         SkScalar sigma = SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(12)/5);
-        SkEmbossMaskFilter* embossFilter = SkEmbossMaskFilter::Create(sigma, light);
+        SkMaskFilter* embossFilter = SkEmbossMaskFilter::Create(sigma, light);
 
         SkXfermode* xfermode = SkXfermode::Create(SkXfermode::kXor_Mode);
         SkColorFilter* lightingFilter = SkColorFilter::CreateLightingFilter(
             0xff89bc45, 0xff112233);
 
         canvas->save();
         canvas->translate(SkIntToScalar(0), SkIntToScalar(5));
         paint.setAntiAlias(true);
         paint.setFilterQuality(kLow_SkFilterQuality);
         // !!! draw through a clip
@@ skipping 175 matching lines @@
 private:
     SkPoint fClickPt;
     SkBitmap fBug, fTb, fTx;
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new DemoView; }
 static SkViewRegister reg(MyFactory);