Make cloning of File objects more useful.

Source/core/fileapi/File.cpp

 /*
  * Copyright (C) 2008 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 95 matching lines @@
     : Blob(BlobDataHandle::create(createBlobDataForFileWithName(path, name, policy), -1))
     , m_hasBackingFile(true)
     , m_path(path)
     , m_name(name)
     , m_snapshotSize(-1)
     , m_snapshotModificationTime(invalidFileTime())
 {
     ScriptWrappable::init(this);
 }
 
-File::File(const String& path, PassRefPtr<BlobDataHandle> blobDataHandle)
+File::File(const String& path, const String& name, const String& relativePath, bool hasSnaphotData, uint64_t size, double lastModified, PassRefPtr<BlobDataHandle> blobDataHandle)
     : Blob(blobDataHandle)
-    , m_hasBackingFile(true)
+    , m_hasBackingFile(!path.isEmpty() || !relativePath.isEmpty())
     , m_path(path)
-    , m_name(blink::Platform::current()->fileUtilities()->baseName(path))
-    , m_snapshotSize(-1)
-    , m_snapshotModificationTime(invalidFileTime())
+    , m_name(name)
+    , m_snapshotSize(hasSnaphotData ? static_cast<long long>(size) : -1)
+    , m_snapshotModificationTime(hasSnaphotData ? lastModified : invalidFileTime())
+    , m_relativePath(relativePath)
 {
     ScriptWrappable::init(this);
-    // FIXME: File object serialization/deserialization does not include
-    // newer file object data members: m_name and m_relativePath.
-    // See SerializedScriptValue.cpp.
 }
 
 File::File(const String& name, double modificationTime, PassRefPtr<BlobDataHandle> blobDataHandle)
     : Blob(blobDataHandle)
     , m_hasBackingFile(false)
     , m_name(name)
     , m_snapshotSize(Blob::size())
     , m_snapshotModificationTime(modificationTime)
 {
     ScriptWrappable::init(this);
@@ skipping 60 matching lines @@
         snapshotSize = 0;
         snapshotModificationTime = invalidFileTime();
         return;
     }
 
     snapshotSize = metadata.length;
     snapshotModificationTime = metadata.modificationTime;
 }
 
 } // namespace WebCore