Added Dartium changes onto 45.0.2454.104

Source/bindings/core/dart/DartPersistentValue.h

Index: Source/bindings/core/dart/DartPersistentValue.h
diff --git a/Source/modules/filesystem/HTMLInputElementFileSystem.h b/Source/bindings/core/dart/DartPersistentValue.h
similarity index 74%
copy from Source/modules/filesystem/HTMLInputElementFileSystem.h
copy to Source/bindings/core/dart/DartPersistentValue.h
index 526f67f2478abc9876818db8b5a6345371c9bfdc..db92b4e5a71663ec38855c178ef6964d52139f7c 100644
--- a/Source/modules/filesystem/HTMLInputElementFileSystem.h
+++ b/Source/bindings/core/dart/DartPersistentValue.h
@@ -28,25 +28,29 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef HTMLInputElementFileSystem_h
-#define HTMLInputElementFileSystem_h
+#ifndef DartPersistentValue_h
+#define DartPersistentValue_h
 
-#include "modules/filesystem/EntriesCallback.h"
+#include "bindings/core/dart/DartIsolateDestructionObserver.h"
+#include "wtf/Noncopyable.h"
+#include "wtf/RefPtr.h"
+#include <dart_api.h>
 
 namespace blink {
 
-class HTMLInputElement;
-class ExecutionContext;
-
-class HTMLInputElementFileSystem {
+class DartPersistentValue : public DartIsolateDestructionObserver {
+    WTF_MAKE_NONCOPYABLE(DartPersistentValue);
 public:
-    static EntryHeapVector webkitEntries(ExecutionContext*, HTMLInputElement&);
+    explicit DartPersistentValue(Dart_Handle value);
+    ~DartPersistentValue();
+
+    Dart_PersistentHandle value() const { return m_value; }
+    void clear();
 
 private:
-    HTMLInputElementFileSystem();
-    ~HTMLInputElementFileSystem();
+    Dart_PersistentHandle m_value;
 };
 
-} // namespace blink
+}
 
-#endif // HTMLInputElementFileSystem_h
+#endif // DartPersistentValue_h