Change getRange to sublist. Make getRange deprecated.

runtime/lib/invocation_mirror_patch.dart

Index: runtime/lib/invocation_mirror_patch.dart
diff --git a/runtime/lib/invocation_mirror_patch.dart b/runtime/lib/invocation_mirror_patch.dart
index 6a55ca2dff7bb0fe2a62c493764795493aab633a..c498eac3295201549688ffe324c366754e2e59c7 100644
--- a/runtime/lib/invocation_mirror_patch.dart
+++ b/runtime/lib/invocation_mirror_patch.dart
@@ -56,9 +56,9 @@ class _InvocationMirror implements InvocationMirror {
 
   List get positionalArguments {
     if (_positionalArguments == null) {
+      int numPositionalArguments = _argumentsDescriptor[1];
       // Exclude receiver.
-      int numPositionalArguments = _argumentsDescriptor[1] - 1;
-      _positionalArguments = _arguments.getRange(1, numPositionalArguments);
+      _positionalArguments = _arguments.sublist(1, numPositionalArguments);
     }
     return _positionalArguments;
   }