Fix out-of-memory crashes related to ArrayBuffer allocation

third_party/WebKit/Source/core/fileapi/FileReaderLoader.cpp

 /*
  * Copyright (C) 2010 Google Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 289 matching lines @@
     switch (httpStatusCode) {
     case 403:
         return FileError::SECURITY_ERR;
     case 404:
         return FileError::NOT_FOUND_ERR;
     default:
         return FileError::NOT_READABLE_ERR;
     }
 }
 
-PassRefPtr<DOMArrayBuffer> FileReaderLoader::arrayBufferResult() const
+PassRefPtr<DOMArrayBuffer> FileReaderLoader::arrayBufferResultOrNull() const
 {
     ASSERT(m_readType == ReadAsArrayBuffer);
 
     // If the loading is not started or an error occurs, return an empty result.
     if (!m_rawData || m_errorCode)
         return nullptr;
 
-    return DOMArrayBuffer::create(m_rawData->toArrayBuffer());
+    return DOMArrayBuffer::createOrNull(m_rawData->toArrayBuffer());
 }
 
 String FileReaderLoader::stringResult()
 {
     ASSERT(m_readType != ReadAsArrayBuffer && m_readType != ReadByClient);
 
     // If the loading is not started or an error occurs, return an empty result.
     if (!m_rawData || m_errorCode)
         return m_stringResult;
 
@@ skipping 72 matching lines @@
     m_stringResult = builder.toString();
 }
 
 void FileReaderLoader::setEncoding(const String& encoding)
 {
     if (!encoding.isEmpty())
         m_encoding = WTF::TextEncoding(encoding);
 }
 
 } // namespace blink