Avoid yet another import of dart:_collection_dev in the core patch library. Use the prefix _collect…

runtime/lib/function_patch.dart

Index: runtime/lib/function_patch.dart
===================================================================
--- runtime/lib/function_patch.dart	(revision 22061)
+++ runtime/lib/function_patch.dart	(working copy)
@@ -22,7 +22,7 @@
     if (numNamedArguments > 0) {
       namedArguments.forEach((name, value) {
         arguments[argumentIndex++] = value;
-        names[nameIndex++] = _symbol_dev.Symbol.getName(name);
+        names[nameIndex++] = _collection_dev.Symbol.getName(name);
       });
     }
     return _apply(arguments, names);