add --writeChecksumBasedFilenames flag to render_pictures

tools/CopyTilesRenderer.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef CopyTilesRenderer_DEFINED
 #define CopyTilesRenderer_DEFINED
 
 #include "PictureRenderer.h"
 #include "SkTypes.h"
 
 class SkPicture;
 class SkString;
 
 namespace sk_tools {
     /**
      *  PictureRenderer that draws the picture and then extracts it into tiles. For large pictures,
      *  it will divide the picture into large tiles and draw the picture once for each large tile.
      */
     class CopyTilesRenderer : public TiledPictureRenderer {
 
     public:
         CopyTilesRenderer(int x, int y);
-        virtual void init(SkPicture* pict) SK_OVERRIDE;
+        virtual void init(SkPicture* pict, const SkString* outputDir, const SkString* inputFilename,
+                          bool useChecksumBasedFilenames) SK_OVERRIDE;
 
         /**
          *  Similar to TiledPictureRenderer, this will draw a PNG for each tile. However, the
          *  numbering (and actual tiles) will be different.
          */
-        virtual bool render(const SkString* path, SkBitmap** out) SK_OVERRIDE;
+        virtual bool render(SkBitmap** out) SK_OVERRIDE;
 
         virtual bool supportsTimingIndividualTiles() SK_OVERRIDE { return false; }
 
     private:
         int fXTilesPerLargeTile;
         int fYTilesPerLargeTile;
 
         int fLargeTileWidth;
         int fLargeTileHeight;
 
         virtual SkString getConfigNameInternal() SK_OVERRIDE;
 
         typedef TiledPictureRenderer INHERITED;
     };
 } // sk_tools
 #endif // CopyTilesRenderer_DEFINED