Propagate validation errors

src/core/SkPicture.cpp

 /*
  * 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.
  */
 
 #include "SkAtomics.h"
 #include "SkImageDeserializer.h"
 #include "SkImageGenerator.h"
@@ skipping 139 matching lines @@
 
     if (IsValidPictInfo(info)) {
         if (pInfo) { *pInfo = info; }
         return true;
     }
     return false;
 }
 
 sk_sp<SkPicture> SkPicture::Forwardport(const SkPictInfo& info,
                                         const SkPictureData* data,
-                                        const SkReadBuffer* buffer) {
+                                        SkReadBuffer* buffer) {
     if (!data) {
         return nullptr;
     }
     SkPicturePlayback playback(data);
     SkPictureRecorder r;
     playback.draw(r.beginRecording(info.fCullRect), nullptr/*no callback*/, buffer);
     return r.finishRecordingAsPicture();
 }
 
 sk_sp<SkPicture> SkPicture::MakeFromStream(SkStream* stream, SkImageDeserializer* factory) {
@@ skipping 100 matching lines @@
 #endif
 
 // Global setting to disable security precautions for serialization.
 void SkPicture::SetPictureIOSecurityPrecautionsEnabled_Dangerous(bool set) {
     g_AllPictureIOSecurityPrecautionsEnabled = set;
 }
 
 bool SkPicture::PictureIOSecurityPrecautionsEnabled() {
     return g_AllPictureIOSecurityPrecautionsEnabled;
 }