Added custom bindings for renamed custom functions.

Source/bindings/dart/custom/DartFormDataCustom.cpp

Index: Source/bindings/dart/custom/DartFormDataCustom.cpp
diff --git a/Source/bindings/dart/custom/DartFormDataCustom.cpp b/Source/bindings/dart/custom/DartFormDataCustom.cpp
index 229b169ea89399cc54805ad8debc6c0aa97dc653..3c37fcc7edcaa34bcf605321a86e5aade7febcbe 100644
--- a/Source/bindings/dart/custom/DartFormDataCustom.cpp
+++ b/Source/bindings/dart/custom/DartFormDataCustom.cpp
@@ -70,23 +70,41 @@ void appendCallback(Dart_NativeArguments args)
             goto fail;
 
         Dart_Handle valueHandle = Dart_GetNativeArgument(args, 2);
-        if (DartDOMWrapper::instanceOf<DartBlob>(valueHandle)) {
-            Blob* blob = DartBlob::toNative(valueHandle, exception);
-            if (exception)
-                goto fail;
+        DartStringAdapter value = DartUtilities::dartToStringWithNullCheck(valueHandle, exception);
+        if (exception)
+            goto fail;
 
-            DartStringAdapter filename = DartUtilities::dartToStringWithNullCheck(Dart_GetNativeArgument(args, 3), exception);
-            if (exception)
-                goto fail;
+        receiver->append(name, value);
 
-            receiver->append(name, blob, filename);
-        } else {
-            DartStringAdapter filename = DartUtilities::dartToStringWithNullCheck(valueHandle, exception);
-            if (exception)
-                goto fail;
+        return;
+    }
 
-            receiver->append(name, filename);
-        }
+fail:
+    Dart_ThrowException(exception);
+    ASSERT_NOT_REACHED();
+}
+
+void appendBlobCallback(Dart_NativeArguments args)
+{
+    DartApiScope dartApiScope;
+    Dart_Handle exception = 0;
+    {
+        DOMFormData* receiver = DartDOMWrapper::receiver<DOMFormData>(args);
+
+        DartStringAdapter name = DartUtilities::dartToStringWithNullCheck(Dart_GetNativeArgument(args, 1), exception);
+        if (exception)
+            goto fail;
+
+        Dart_Handle valueHandle = Dart_GetNativeArgument(args, 2);
+        Blob* blob = DartBlob::toNative(valueHandle, exception);
+        if (exception)
+            goto fail;
+
+        DartStringAdapter filename = DartUtilities::dartToStringWithNullCheck(Dart_GetNativeArgument(args, 3), exception);
+        if (exception)
+            goto fail;
+
+        receiver->append(name, blob, filename);
 
         return;
     }