Added the framework for having canvas/recorder/picture record depth_set's.

src/core/SkPictureFlat.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 SkPictureFlat_DEFINED
 #define SkPictureFlat_DEFINED
 
 
@@ skipping 62 matching lines @@
     DRAW_IMAGE_NINE,
     DRAW_IMAGE_RECT,
 
     SAVE_LAYER_SAVELAYERFLAGS_DEPRECATED_JAN_2016,
     SAVE_LAYER_SAVELAYERREC,
 
     DRAW_ANNOTATION,
     DRAW_DRAWABLE,
     DRAW_DRAWABLE_MATRIX,
 
-    LAST_DRAWTYPE_ENUM = DRAW_DRAWABLE_MATRIX,
+    TRANSLATE_Z,
+
+    LAST_DRAWTYPE_ENUM = TRANSLATE_Z
 };
 
 // In the 'match' method, this constant will match any flavor of DRAW_BITMAP*
 static const int kDRAW_BITMAP_FLAVOR = LAST_DRAWTYPE_ENUM+1;
 
 enum DrawVertexFlags {
     DRAW_VERTICES_HAS_TEXS    = 0x01,
     DRAW_VERTICES_HAS_COLORS  = 0x02,
     DRAW_VERTICES_HAS_INDICES = 0x04,
     DRAW_VERTICES_HAS_XFER    = 0x08,
@@ skipping 62 matching lines @@
     void setupBuffer(SkReadBuffer& buffer) const {
         buffer.setFactoryPlayback(fArray, fCount);
     }
 
 private:
     int fCount;
     SkFlattenable::Factory* fArray;
 };
 
 #endif