Make Resource::resourceBuffer() to return PassRefPtr<const SharedBuffer>

third_party/WebKit/Source/core/xml/parser/SharedBufferReader.cpp

 /*
  * Copyright (C) 2014 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 21 matching lines @@
 
 #include "platform/SharedBuffer.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 
 #include <algorithm>
 #include <cstring>
 
 namespace blink {
 
-SharedBufferReader::SharedBufferReader(PassRefPtr<SharedBuffer> buffer)
+SharedBufferReader::SharedBufferReader(PassRefPtr<const SharedBuffer> buffer)
     : m_buffer(buffer)
     , m_currentOffset(0)
 {
 }
 
 SharedBufferReader::~SharedBufferReader()
 {
 }
 
 int SharedBufferReader::readData(char* outputBuffer, int askedToRead)
@@ skipping 14 matching lines @@
         segmentSize = std::min(segmentSize, lenToCopy - bytesCopied);
         memcpy(outputBuffer + bytesCopied, data, segmentSize);
         bytesCopied += segmentSize;
         m_currentOffset += segmentSize;
     }
 
     return safeCast<int>(bytesCopied);
 }
 
 } // namespace blink