Make multipart/x-mixed-replace parser more robust

third_party/WebKit/Source/core/fetch/MultipartImageResourceParser.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /* ***** BEGIN LICENSE BLOCK *****
  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  *
  * The contents of this file are subject to the Mozilla Public License Version
  * 1.1 (the "License"); you may not use this file except in compliance with
  * the License. You may obtain a copy of the License at
@@ skipping 49 matching lines @@
         DEFINE_INLINE_VIRTUAL_TRACE() {}
     };
 
     MultipartImageResourceParser(const ResourceResponse&, const Vector<char>& boundary, Client*);
     void appendData(const char* bytes, size_t);
     void finish();
     void cancel() { m_isCancelled = true; }
 
     DECLARE_TRACE();
 
-    static size_t pushOverLineForTest(const Vector<char>& data, size_t size) { return pushOverLine(data, size); }
+    static size_t skippableLengthForTest(const Vector<char>& data, size_t size) { return skippableLength(data, size); }
     static size_t findBoundaryForTest(const Vector<char>& data, Vector<char>* boundary) { return findBoundary(data, boundary); }
 
 private:
     bool parseHeaders();
     bool isCancelled() const { return m_isCancelled; }
-    static size_t pushOverLine(const Vector<char>&, size_t);
+    static size_t skippableLength(const Vector<char>&, size_t);
     // This function updates |*boundary|.
     static size_t findBoundary(const Vector<char>& data, Vector<char>* boundary);
 
     const ResourceResponse m_originalResponse;
     Vector<char> m_boundary;
     RawPtrWillBeMember<Client> m_client;
 
     Vector<char> m_data;
     bool m_isParsingTop = true;
     bool m_isParsingHeaders = false;
     bool m_sawLastBoundary = false;
     bool m_isCancelled = false;
 };
 
 } // namespace blink
 
 #endif // MultipartImageResourceParser_h