feat: remove MapWrapper.create()/get()/set().

Better dart2js code, better Angular code.

modules/angular2/src/change_detection/coalesce.ts

@@ -1,5 +1,5 @@
 import {isPresent} from 'angular2/src/facade/lang';
-import {List, ListWrapper, Map, MapWrapper} from 'angular2/src/facade/collection';
+import {List, ListWrapper, Map} from 'angular2/src/facade/collection';
 import {RecordType, ProtoRecord} from './proto_record';
 
 /**
@@ -14,7 +14,7 @@ import {RecordType, ProtoRecord} from './proto_record';
  */
 export function coalesce(records: List<ProtoRecord>): List<ProtoRecord> {
   var res: List<ProtoRecord> = [];
-  var indexMap: Map<number, number> = MapWrapper.create();
+  var indexMap: Map<number, number> = new Map<number, number>();
 
   for (var i = 0; i < records.length; ++i) {
     var r = records[i];
@@ -23,14 +23,14 @@ export function coalesce(records: List<ProtoRecord>): List<ProtoRecord> {
 
     if (isPresent(matchingRecord) && record.lastInBinding) {
       res.push(_selfRecord(record, matchingRecord.selfIndex, res.length + 1));
-      MapWrapper.set(indexMap, r.selfIndex, matchingRecord.selfIndex);
+      indexMap.set(r.selfIndex, matchingRecord.selfIndex);
 
     } else if (isPresent(matchingRecord) && !record.lastInBinding) {
-      MapWrapper.set(indexMap, r.selfIndex, matchingRecord.selfIndex);
+      indexMap.set(r.selfIndex, matchingRecord.selfIndex);
 
     } else {
       res.push(record);
-      MapWrapper.set(indexMap, r.selfIndex, record.selfIndex);
+      indexMap.set(r.selfIndex, record.selfIndex);
     }
   }
 
@@ -59,6 +59,6 @@ function _replaceIndices(r: ProtoRecord, selfIndex: number, indexMap: Map<any, a
 }
 
 function _map(indexMap: Map<any, any>, value: number) {
-  var r = MapWrapper.get(indexMap, value);
+  var r = indexMap.get(value);
   return isPresent(r) ? r : value;
 }

modules/angular2/src/change_detection/parser/locals.ts

@@ -18,7 +18,7 @@ export class Locals {
 
   get(name: string) {
     if (MapWrapper.contains(this.current, name)) {
-      return MapWrapper.get(this.current, name);
+      return this.current.get(name);
     }
 
     if (isPresent(this.parent)) {
@@ -33,7 +33,7 @@ export class Locals {
     // exposed to the public API.
     // TODO: vsavkin maybe it should check only the local map
     if (MapWrapper.contains(this.current, name)) {
-      MapWrapper.set(this.current, name, value);
+      this.current.set(name, value);
     } else {
       throw new BaseException(
           `Setting of new keys post-construction is not supported. Key: ${name}.`);

modules/angular2/src/change_detection/pipes/iterable_changes.ts

@@ -574,16 +574,16 @@ class _DuplicateItemRecordList {
 }
 
 class _DuplicateMap {
-  map: Map<any, _DuplicateItemRecordList> = MapWrapper.create();
+  map: Map<any, _DuplicateItemRecordList> = new Map();
 
   put(record: CollectionChangeRecord) {
     // todo(vicb) handle corner cases
     var key = getMapKey(record.item);
 
-    var duplicates = MapWrapper.get(this.map, key);
+    var duplicates = this.map.get(key);
     if (!isPresent(duplicates)) {
       duplicates = new _DuplicateItemRecordList();
-      MapWrapper.set(this.map, key, duplicates);
+      this.map.set(key, duplicates);
     }
     duplicates.add(record);
   }
@@ -598,7 +598,7 @@ class _DuplicateMap {
   get(value, afterIndex = null): CollectionChangeRecord {
     var key = getMapKey(value);
 
-    var recordList = MapWrapper.get(this.map, key);
+    var recordList = this.map.get(key);
     return isBlank(recordList) ? null : recordList.get(value, afterIndex);
   }
 
@@ -611,7 +611,7 @@ class _DuplicateMap {
     var key = getMapKey(record.item);
     // todo(vicb)
     // assert(this.map.containsKey(key));
-    var recordList: _DuplicateItemRecordList = MapWrapper.get(this.map, key);
+    var recordList: _DuplicateItemRecordList = this.map.get(key);
     // Remove the list of duplicates when it gets empty
     if (recordList.remove(record)) {
       MapWrapper.delete(this.map, key);

modules/angular2/src/change_detection/pipes/keyvalue_changes.ts

@@ -19,7 +19,7 @@ export class KeyValueChangesFactory extends PipeFactory {
  * @exportedAs angular2/pipes
  */
 export class KeyValueChanges extends Pipe {
-  private _records: Map<any, any> = MapWrapper.create();
+  private _records: Map<any, any> = new Map();
   private _mapHead: KVChangeRecord = null;
   private _previousMapHead: KVChangeRecord = null;
   private _changesHead: KVChangeRecord = null;
@@ -106,10 +106,10 @@ export class KeyValueChanges extends Pipe {
           this._addToRemovals(oldSeqRecord);
         }
         if (MapWrapper.contains(records, key)) {
-          newSeqRecord = MapWrapper.get(records, key);
+          newSeqRecord = records.get(key);
         } else {
           newSeqRecord = new KVChangeRecord(key);
-          MapWrapper.set(records, key, newSeqRecord);
+          records.set(key, newSeqRecord);
           newSeqRecord.currentValue = value;
           this._addToAdditions(newSeqRecord);
         }