[Thread-safe] Take deep copy of String/KURL in FormData::deepCopy()

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 77 matching lines @@
 
     size_t n = m_elements.size();
     formData->m_elements.reserveInitialCapacity(n);
     for (size_t i = 0; i < n; ++i) {
         const FormDataElement& e = m_elements[i];
         switch (e.m_type) {
         case FormDataElement::data:
             formData->m_elements.uncheckedAppend(FormDataElement(e.m_data));
             break;
         case FormDataElement::encodedFile:
-            formData->m_elements.uncheckedAppend(FormDataElement(e.m_filename, e.m_fileStart, e.m_fileLength, e.m_expectedFileModificationTime));
+            formData->m_elements.uncheckedAppend(FormDataElement(e.m_filename.isolatedCopy(), e.m_fileStart, e.m_fileLength, e.m_expectedFileModificationTime));
             break;
         case FormDataElement::encodedBlob:
-            formData->m_elements.uncheckedAppend(FormDataElement(e.m_blobUUID, e.m_optionalBlobDataHandle));
+            formData->m_elements.uncheckedAppend(FormDataElement(e.m_blobUUID.isolatedCopy(), e.m_optionalBlobDataHandle));
             break;
         case FormDataElement::encodedFileSystemURL:
-            formData->m_elements.uncheckedAppend(FormDataElement(e.m_fileSystemURL, e.m_fileStart, e.m_fileLength, e.m_expectedFileModificationTime));
+            formData->m_elements.uncheckedAppend(FormDataElement(e.m_fileSystemURL.copy(), e.m_fileStart, e.m_fileLength, e.m_expectedFileModificationTime));
             break;
         }
     }
     return formData.release();
 }
 
 void FormData::appendData(const void* data, size_t size)
 {
     if (m_elements.isEmpty() || m_elements.last().m_type != FormDataElement::data)
         m_elements.append(FormDataElement());
@@ skipping 66 matching lines @@
             break;
         case FormDataElement::encodedFileSystemURL:
             size += e.m_fileLength - e.m_fileStart;
             break;
         }
     }
     return size;
 }
 
 } // namespace blink