webkit: Instead of doing a conversion just use string16().

webkit/dom_storage/dom_storage_database_unittest.cc

Index: webkit/dom_storage/dom_storage_database_unittest.cc
diff --git a/webkit/dom_storage/dom_storage_database_unittest.cc b/webkit/dom_storage/dom_storage_database_unittest.cc
index e45a5c2cb2f14272e56eb39a4f8971bc8d172db4..b11ea89201ba93f65bb0f2f88f25b4af251dc148 100644
--- a/webkit/dom_storage/dom_storage_database_unittest.cc
+++ b/webkit/dom_storage/dom_storage_database_unittest.cc
@@ -91,7 +91,7 @@ void CreateMapWithValues(ValuesMap* values) {
       NullableString16(ASCIIToUTF16("123"), false),
       NullableString16(ASCIIToUTF16("Google"), false),
       NullableString16(ASCIIToUTF16("18-01-2012"), false),
-      NullableString16(ASCIIToUTF16(""), false)
+      NullableString16(string16(), false)
   };
   for (unsigned i = 0; i < sizeof(kCannedKeys) / sizeof(kCannedKeys[0]); i++)
     (*values)[kCannedKeys[i]] = kCannedValues[i];