Big merge from experimental to bleeding edge.

runtime/lib/function_patch.dart

Index: runtime/lib/function_patch.dart
diff --git a/runtime/lib/function_patch.dart b/runtime/lib/function_patch.dart
index 56b817dada646d2dd478ea2caebbc8c1aa264c47..cb5a0c274114a88b30a4d4fd78eef7c63ec137c7 100644
--- a/runtime/lib/function_patch.dart
+++ b/runtime/lib/function_patch.dart
@@ -13,10 +13,10 @@ patch class Function {
         (positionalArguments != null ? positionalArguments.length : 0);
     int numNamedArguments = namedArguments != null ? namedArguments.length : 0;
     int numArguments = numPositionalArguments + numNamedArguments;
-    List arguments = new List(numArguments);
+    List arguments = new List.fixedLength(numArguments);
     arguments[0] = function;
     arguments.setRange(1, numPositionalArguments - 1, positionalArguments);
-    List names = new List(numNamedArguments);
+    List names = new List.fixedLength(numNamedArguments);
     int argumentIndex = numPositionalArguments;
     int nameIndex = 0;
     if (numNamedArguments > 0) {