New FormData methods: get, getAll, has, set, delete and iterable

Source/core/fileapi/File.h

Index: Source/core/fileapi/File.h
diff --git a/Source/core/fileapi/File.h b/Source/core/fileapi/File.h
index 9df6bd1839c2f330f87496eb2b5a4f79564576f3..30cf60a8bb5ecf04569ea40f1552145f79abd8f6 100644
--- a/Source/core/fileapi/File.h
+++ b/Source/core/fileapi/File.h
@@ -104,6 +104,8 @@ public:
         return adoptRefWillBeNoop(new File(path, name, policy, File::IsNotUserVisible));
     }
 
+    PassRefPtrWillBeRawPtr<File> clone(const String& name = String()) const;
+
     virtual unsigned long long size() const OVERRIDE;
     virtual PassRefPtrWillBeRawPtr<Blob> slice(long long start, long long end, const String& contentType, ExceptionState&) const OVERRIDE;
     virtual void close(ExecutionContext*, ExceptionState&) OVERRIDE;
@@ -142,6 +144,7 @@ private:
     File(const String& name, double modificationTime, PassRefPtr<BlobDataHandle>);
     File(const String& name, const FileMetadata&, UserVisibility);
     File(const KURL& fileSystemURL, const FileMetadata&);
+    File(const File&);
 
     void invalidateSnapshotMetadata() { m_snapshotSize = -1; }