Add sk_parallel_for()

include/core/SkMultiPictureDraw.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkMultiPictureDraw_DEFINED
 #define SkMultiPictureDraw_DEFINED
 
@@ skipping 48 matching lines @@
     struct DrawData {
         SkCanvas*        fCanvas;  // reffed
         const SkPicture* fPicture; // reffed
         SkMatrix         fMatrix;
         SkPaint*         fPaint;   // owned
 
         void init(SkCanvas*, const SkPicture*, const SkMatrix*, const SkPaint*);
         void draw();
 
         static void Reset(SkTDArray<DrawData>&);
-
-        static void Draw(DrawData* d) { d->draw(); }
     };
 
     SkTDArray<DrawData> fThreadSafeDrawData;
     SkTDArray<DrawData> fGPUDrawData;
 };
 
 #endif