Gradients are serialized (and can be constructed) as SkColor4f + SkColorSpace

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
 #define SkPicture_DEFINED
 
@@ skipping 208 matching lines @@
     // V42: Added a bool to SkPictureShader serialization to indicate did-we-serialize-a-picture?
     // V43: Added DRAW_IMAGE and DRAW_IMAGE_RECT opt codes to serialized data
     // V44: Move annotations from paint to drawAnnotation
     // V45: Add invNormRotation to SkLightingShader.
     // V46: Add drawTextRSXform
     // V47: Add occluder rect to SkBlurMaskFilter
     // V48: Read and write extended SkTextBlobs.
 
     // Only SKPs within the min/current picture version range (inclusive) can be read.
     static const uint32_t     MIN_PICTURE_VERSION = 35;     // Produced by Chrome M39.
-    static const uint32_t CURRENT_PICTURE_VERSION = 48;
+    static const uint32_t CURRENT_PICTURE_VERSION = 49;
 
     static_assert(MIN_PICTURE_VERSION <= 41,
                   "Remove kFontFileName and related code from SkFontDescriptor.cpp.");
 
     static_assert(MIN_PICTURE_VERSION <= 42,
                   "Remove COMMENT API handlers from SkPicturePlayback.cpp");
 
     static_assert(MIN_PICTURE_VERSION <= 43,
                   "Remove SkBitmapSourceDeserializer.");
 
     static_assert(MIN_PICTURE_VERSION <= 45,
                   "Remove decoding of old SkTypeface::Style from SkFontDescriptor.cpp.");
 

[f(malita), 2016/09/28 15:41:52]

nit: static_assert(MIN_PICTURE_VERSION <= 48, "Remove legacy gradient
deserialization code.")?

[Brian Osman, 2016/09/28 15:46:17]

Acknowledged. I'll add a comment to the version log above, too.

     static bool IsValidPictInfo(const SkPictInfo& info);
     static sk_sp<SkPicture> Forwardport(const SkPictInfo&,
                                         const SkPictureData*,
                                         const SkReadBuffer* buffer);
 
     SkPictInfo createHeader() const;
     SkPictureData* backport() const;
 
     mutable uint32_t fUniqueID;
 };
 
 #endif