[Blob] Dependencies for blob storage testing

Source/platform/exported/WebThreadSafeData.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 27 matching lines @@
 void WebThreadSafeData::reset()
 {
     m_private.reset();
 }
 
 void WebThreadSafeData::assign(const WebThreadSafeData& other)
 {
     m_private = other.m_private;
 }
 
+void WebThreadSafeData::assign(const char* data, size_t length)
+{
+    m_private = RawData::create().leakRef();
+    m_private->mutableData()->append(data, length);
+}
+
 size_t WebThreadSafeData::size() const
 {
     if (m_private.isNull())
         return 0;
     return m_private->length();
 }
 
 const char* WebThreadSafeData::data() const
 {
     if (m_private.isNull())
         return 0;
     return m_private->data();
 }
 
 WebThreadSafeData::WebThreadSafeData(const PassRefPtr<RawData>& data)
     : m_private(data.leakRef())
 {
 }
 
 WebThreadSafeData& WebThreadSafeData::operator=(const PassRefPtr<RawData>& data)
 {
     m_private = data;
     return *this;
 }
 
 } // namespace blink