dart2js cps: Rewrite more List operations into JS array operations.

pkg/compiler/lib/src/js_backend/codegen/codegen.dart

Index: pkg/compiler/lib/src/js_backend/codegen/codegen.dart
diff --git a/pkg/compiler/lib/src/js_backend/codegen/codegen.dart b/pkg/compiler/lib/src/js_backend/codegen/codegen.dart
index 5375526aa16376709e6be2da8ac194647e7ddf97..df8c3070d134f706adc39df77b54fb878edec704 100644
--- a/pkg/compiler/lib/src/js_backend/codegen/codegen.dart
+++ b/pkg/compiler/lib/src/js_backend/codegen/codegen.dart
@@ -16,7 +16,7 @@ import '../../elements/elements.dart';
 import '../../io/source_information.dart' show SourceInformation;
 import '../../js/js.dart' as js;
 import '../../tree_ir/tree_ir_nodes.dart' as tree_ir;
-import '../../tree_ir/tree_ir_nodes.dart' show BuiltinOperator;
+import '../../tree_ir/tree_ir_nodes.dart' show BuiltinOperator, BuiltinMethod;
 import '../../types/types.dart' show TypeMask;
 import '../../universe/universe.dart' show
     Selector,
@@ -833,6 +833,21 @@ class CodeGenerator extends tree_ir.StatementVisitor
     }
   }
 
+  /// The JS name of a built-in method.
+  static final Map<BuiltinMethod, String> builtinMethodName = 
+    const <BuiltinMethod, String>{
+      BuiltinMethod.Push: 'push',
+      BuiltinMethod.Pop: 'pop',
+  };
+
+  @override
+  js.Expression visitApplyBuiltinMethod(tree_ir.ApplyBuiltinMethod node) {
+    String name = builtinMethodName[node.method];
+    js.Expression receiver = visitExpression(node.receiver);
+    List<js.Expression> args = visitExpressionList(node.arguments);
+    return js.js('#.#(#)', [receiver, name, args]);
+  }
+
   @override
   js.Expression visitAwait(tree_ir.Await node) {
     return new js.Await(visitExpression(node.input));