feat(perf): port table scrolling benchmark to Angular 2

modules/angular2/src/change_detection/proto_change_detector.js

@@ -360,7 +360,7 @@ function _operationToFunction(operation:string):Function {
 }
 
 function s(v) {
-  return isPresent(v) ? '' + v : '';
+  return isPresent(v) ? `${v}` : '';
 }
 
 function _interpolationFn(strings:List) {

modules/angular2/src/core/compiler/view.js

@@ -411,7 +411,8 @@ export class ProtoView {
       // view might get dehydrated, in between the event queuing up and
       // firing.
       if (view.hydrated()) {
-        MapWrapper.set(locals, '\$event', event);
+        // HACK
+        MapWrapper.set(locals, `$event`, event);
         var context = new ContextWithVariableBindings(view.context, locals);
         expr.eval(context);
       }

modules/angular2/src/facade/collection.dart

@@ -71,7 +71,7 @@ class StringMapWrapper {
 }
 
 class ListWrapper {
-  static List clone(List l) => new List.from(l);
+  static List clone(Iterable l) => new List.from(l);
   static List create() => new List();
   static List createFixedSize(int size) => new List(size);
   static get(List m, int k) => m[k];
@@ -137,6 +137,9 @@ class ListWrapper {
     }
     return true;
   }
+  static List slice(List l, int from, int to) {
+    return l.sublist(from, to);
+  }
 }
 
 bool isListLikeIterable(obj) => obj is Iterable;

modules/angular2/src/facade/collection.es6

@@ -176,6 +176,9 @@ export class ListWrapper {
     }
     return true;
   }
+  static slice(l:List, from:int, to:int):List {
+    return l.slice(from, to);
+  }
 }
 
 export function isListLikeIterable(obj):boolean {

modules/angular2/src/facade/math.dart

@@ -6,4 +6,8 @@ class Math {
   static num pow(num x, num exponent) {
     return math.pow(x, exponent);
   }
+
+  static num min(num a, num b) => math.min(a, b);
+
+  static num floor(num a) => a.floor();
 }