Back off from SkPicture API hardening a bit

include/core/SkPicture.h

 
 /*
  * Copyright 2007 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkPicture_DEFINED
@@ skipping 223 matching lines @@
 
     // Note: If the picture version needs to be increased then please follow the
     // steps to generate new SKPs in (only accessible to Googlers): http://goo.gl/qATVcw
 
     // Only SKPs within the min/current picture version range (inclusive) can be read.
     static const uint32_t MIN_PICTURE_VERSION = 19;
     static const uint32_t CURRENT_PICTURE_VERSION = 29;
 
     mutable uint32_t      fUniqueID;
 
-    SkAutoTDelete<const SkPictureData> fData;
+    // TODO: make SkPictureData const when clone method goes away
+    SkAutoTDelete<SkPictureData> fData;
     int                   fWidth, fHeight;
     mutable SkAutoTUnref<const AccelData> fAccelData;
 
     void needsNewGenID() { fUniqueID = SK_InvalidGenID; }
 
     // Create a new SkPicture from an existing SkPictureData. Ref count of
     // data is unchanged.
     SkPicture(SkPictureData* data, int width, int height);
 
     SkPicture(int width, int height, const SkPictureRecord& record, bool deepCopyOps);
@@ skipping 34 matching lines @@
     friend class SkPicturePlayback; // to get fData
 
     typedef SkRefCnt INHERITED;
 
     SkPicture(int width, int height, SkRecord*);  // Takes ownership.
     SkAutoTDelete<SkRecord> fRecord;
     bool fRecordWillPlayBackBitmaps; // TODO: const
 };
 
 #endif