Implement FormData::isSafeToSendToAnotherThread()

Source/platform/network/FormData.cpp

 /*
  * Copyright (C) 2004, 2006, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 11 matching lines @@
 #include "config.h"
 #include "platform/network/FormData.h"
 
 #include "platform/FileMetadata.h"
 #include "platform/network/FormDataBuilder.h"
 #include "wtf/text/CString.h"
 #include "wtf/text/TextEncoding.h"
 
 namespace blink {
 
+bool FormDataElement::isSafeToSendToAnotherThread() const
+{
+    return m_filename.isSafeToSendToAnotherThread()
+        && m_blobUUID.isSafeToSendToAnotherThread()
+        && m_fileSystemURL.isSafeToSendToAnotherThread();
+}
+
 inline FormData::FormData()
     : m_identifier(0)
     , m_containsPasswordData(false)
 {
 }
 
 inline FormData::FormData(const FormData& data)
     : RefCounted<FormData>()
     , m_elements(data.m_elements)
     , m_identifier(data.m_identifier)
@@ skipping 138 matching lines @@
                 size += e.m_optionalBlobDataHandle->size();
             break;
         case FormDataElement::encodedFileSystemURL:
             size += e.m_fileLength - e.m_fileStart;
             break;
         }
     }
     return size;
 }
 
+bool FormData::isSafeToSendToAnotherThread() const
+{
+    if (!hasOneRef())
+        return false;
+    size_t n = m_elements.size();
+    for (size_t i = 0; i < n; ++i) {

[haraken, 2015/08/11 10:58:45]

  for (auto element : m_elements)

would be better. [i] has an overhead of RELEASE_ASSERT for an index range check.

[hiroshige, 2015/08/11 11:20:28]

Done.
(I used "auto& element" instead of "auto element" to avoid implicit copy to
|element|)

+        if (!m_elements[i].isSafeToSendToAnotherThread())
+            return false;
+    }
+    return true;
+}
+
 } // namespace blink