Import Dart bindings as of Blink r188698. This merely copies the files over and does not attach any…

sky/engine/bindings-dart/core/dart/DartWrapperTypeInfo.h

Index: sky/engine/bindings-dart/core/dart/DartWrapperTypeInfo.h
diff --git a/sky/engine/core/loader/UniqueIdentifier.h b/sky/engine/bindings-dart/core/dart/DartWrapperTypeInfo.h
similarity index 83%
copy from sky/engine/core/loader/UniqueIdentifier.h
copy to sky/engine/bindings-dart/core/dart/DartWrapperTypeInfo.h
index 87f28f228caab2136a7b41e51d17d853843371fd..086d3cff132dc3f8b824a5f72f05489277f8df7b 100644
--- a/sky/engine/core/loader/UniqueIdentifier.h
+++ b/sky/engine/bindings-dart/core/dart/DartWrapperTypeInfo.h
@@ -28,14 +28,19 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef SKY_ENGINE_CORE_LOADER_UNIQUEIDENTIFIER_H_
-#define SKY_ENGINE_CORE_LOADER_UNIQUEIDENTIFIER_H_
+#ifndef DartWrapperTypeInfo_h
+#define DartWrapperTypeInfo_h
+
 
 namespace blink {
 
-unsigned long createUniqueIdentifier();
+    struct DartWrapperTypeInfo {
+    };
 
+    template<class ElementType>
+    class DartWrapperTypeTraits {
+        // specialized classes have thier own functions, which are generated by binding generator.
+    };
 }
 
-#endif  // SKY_ENGINE_CORE_LOADER_UNIQUEIDENTIFIER_H_
-
+#endif // DartWrapperTypeInfo_h