Implement SkBaseDevice snapshot support

src/core/SkPictureRecord.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkPictureRecord_DEFINED
 #define SkPictureRecord_DEFINED
 
@@ skipping 78 matching lines @@
      * Returns the start offset of the chunk. This is the location at which
      * the opcode & size are stored.
      * TODO: since we are handing the size into here we could call reserve
      * and then return a pointer to the memory storage. This could decrease
      * allocation overhead but could lead to more wasted space (the tail
      * end of blocks could go unused). Possibly add a second addDraw that
      * operates in this manner.
      */
     size_t addDraw(DrawType drawType, size_t* size) {
         size_t offset = fWriter.bytesWritten();
-
-        this->predrawNotify();
         fContentInfo.addOperation();
 
         SkASSERT(0 != *size);
         SkASSERT(((uint8_t) drawType) == drawType);
 
         if (0 != (*size & ~MASK_24) || *size == MASK_24) {
             fWriter.writeInt(PACK_8_24(drawType, MASK_24));
             *size += 1;
             fWriter.writeInt(SkToU32(*size));
         } else {
@@ skipping 126 matching lines @@
 
     uint32_t fRecordFlags;
     int      fInitialSaveCount;
 
     friend class SkPictureData;   // for SkPictureData's SkPictureRecord-based constructor
 
     typedef SkCanvas INHERITED;
 };
 
 #endif