Bug 649150: Make sure that all blobs and files sent using FormData have a filename in the encoded submission. r=mounir

content/base/test/fileutils.js

@@ -36,7 +36,7 @@ function testFile(file, contents, test) {
                       [{ name: "hello", value: "world"},
                        { name: "myfile",
                          value: contents,
-                         fileName: file.name || "",
+                         fileName: file.name || "blob",
                          contentType: file.type || "application/octet-stream" }]);
     testHasRun();
   }

content/html/content/src/nsFormSubmission.cpp

@@ -485,6 +485,11 @@ nsFSMultipartFormData::AddNameFilePair(const nsAString& aName,
       rv = file->GetName(filename16);
       NS_ENSURE_SUCCESS(rv, rv);
     }
+
+    if (filename16.IsEmpty()) {
+      filename16.AssignLiteral("blob");
+    }
+
     rv = EncodeVal(filename16, filename, true);
     NS_ENSURE_SUCCESS(rv, rv);