Make cloning of File objects more useful.

Source/bindings/v8/SerializedScriptValue.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 531 matching lines @@
     {
         append(GenerateFreshDenseArrayTag);
         doWriteUint32(length);
     }
 
     v8::Isolate* getIsolate() { return m_isolate; }
 
 private:
     void doWriteFile(const File& file)
     {
-        doWriteWebCoreString(file.path());
+        doWriteWebCoreString(file.hasBackingFile() ? file.path() : "");
+        doWriteWebCoreString(file.name());
+        doWriteWebCoreString(file.webkitRelativePath());
         doWriteWebCoreString(file.uuid());
         doWriteWebCoreString(file.type());
+
+        // FIXME don't use 4 bytes to encode a flag.
+        if (file.hasValidSnapshotMetadata()) {
+            doWriteUint32(static_cast<uint8_t>(1));
+
+            long long size;
+            double lastModified;
+            file.captureSnapshot(size, lastModified);
+            doWriteUint64(static_cast<uint64_t>(size));
+            doWriteNumber(lastModified);
+        } else {
+            append(static_cast<uint8_t>(0));
+        }
     }
 
     void doWriteArrayBuffer(const ArrayBuffer& arrayBuffer)
     {
         uint32_t byteLength = arrayBuffer.byteLength();
         doWriteUint32(byteLength);
         append(static_cast<const uint8_t*>(arrayBuffer.data()), byteLength);
     }
 
     void doWriteString(const char* data, int length)
@@ skipping 1314 matching lines @@
         }
         *value = toV8(fileList.release(), v8::Handle<v8::Object>(), m_isolate);
         return true;
     }
 
     PassRefPtr<File> doReadFileHelper()
     {
         if (m_version < 3)
             return 0;
         String path;
+        String name;
+        String relativePath;
         String uuid;
         String type;
+        uint32_t hasSnapshot = 0;
+        uint64_t size = 0;
+        double lastModified = 0;
         if (!readWebCoreString(&path))
             return 0;
+        if (m_version >= 4 && !readWebCoreString(&name))
+            return 0;
+        if (m_version >= 4 && !readWebCoreString(&relativePath))
+            return 0;
         if (!readWebCoreString(&uuid))
             return 0;
         if (!readWebCoreString(&type))
             return 0;
-        return File::create(path, getOrCreateBlobDataHandle(uuid, type));
+        if (m_version >= 4 && !doReadUint32(&hasSnapshot))
+            return 0;
+        if (hasSnapshot) {
+            if (!doReadUint64(&size))
+                return 0;
+            if (!doReadNumber(&lastModified))
+                return 0;
+        }
+        return File::create(path, name, relativePath, hasSnapshot > 0, size, lastModified, getOrCreateBlobDataHandle(uuid, type));
     }
 
     template<class T>
     bool doReadUintHelper(T* value)
     {
         *value = 0;
         uint8_t currentByte;
         int shift = 0;
         do {
             if (m_position >= m_length)
@@ skipping 558 matching lines @@
     // If the allocated memory was not registered before, then this class is likely
     // used in a context other then Worker's onmessage environment and the presence of
     // current v8 context is not guaranteed. Avoid calling v8 then.
     if (m_externallyAllocatedMemory) {
         ASSERT(v8::Isolate::GetCurrent());
         v8::Isolate::GetCurrent()->AdjustAmountOfExternalAllocatedMemory(-m_externallyAllocatedMemory);
     }
 }
 
 } // namespace WebCore