refactor(EventEmitter): rename .next() to .emit()

BREAKING CHANGE:

EventEmitter#next(value) is deprecated, use EventEmitter#emit(value)
instead.

Closes #4287

Closes #5302

modules/angular2/src/core/linker/query_list.ts

@@ -66,5 +66,5 @@ export class QueryList<T> {
   reset(res: T[]): void { this._results = res; }
 
   /** @internal */
-  notifyOnChanges(): void { this._emitter.next(this); }
+  notifyOnChanges(): void { this._emitter.emit(this); }
 }

modules/angular2/src/core/metadata.ts

@@ -1321,8 +1321,8 @@ export var Input: InputFactory = makePropDecorator(InputMetadata);
  *   @Output('everyFiveSeconds') five5Secs = new EventEmitter();
  *
  *   constructor() {
- *     setInterval(() => this.everySecond.next("event"), 1000);
- *     setInterval(() => this.five5Secs.next("event"), 5000);
+ *     setInterval(() => this.everySecond.emit("event"), 1000);
+ *     setInterval(() => this.five5Secs.emit("event"), 5000);
  *   }
  * }
  *

modules/angular2/src/core/metadata/directives.ts

@@ -496,8 +496,8 @@ export class DirectiveMetadata extends InjectableMetadata {
    *   five5Secs = new EventEmitter();
    *
    *   constructor() {
-   *     setInterval(() => this.everySecond.next("event"), 1000);
-   *     setInterval(() => this.five5Secs.next("event"), 5000);
+   *     setInterval(() => this.everySecond.emit("event"), 1000);
+   *     setInterval(() => this.five5Secs.emit("event"), 5000);
    *   }
    * }
    *
@@ -1047,8 +1047,8 @@ export class InputMetadata {
  *   @Output('everyFiveSeconds') five5Secs = new EventEmitter();
  *
  *   constructor() {
- *     setInterval(() => this.everySecond.next("event"), 1000);
- *     setInterval(() => this.five5Secs.next("event"), 5000);
+ *     setInterval(() => this.everySecond.emit("event"), 1000);
+ *     setInterval(() => this.five5Secs.emit("event"), 5000);
  *   }
  * }
  *

modules/angular2/src/core/zone/ng_zone.ts

@@ -187,7 +187,7 @@ export class NgZone {
 
   /** @internal */
   _notifyOnTurnStart(parentRun): void {
-    parentRun.call(this._innerZone, () => { this._onTurnStartEvents.next(null); });
+    parentRun.call(this._innerZone, () => { this._onTurnStartEvents.emit(null); });
   }
 
   /**
@@ -216,7 +216,7 @@ export class NgZone {
 
   /** @internal */
   _notifyOnTurnDone(parentRun): void {
-    parentRun.call(this._innerZone, () => { this._onTurnDoneEvents.next(null); });
+    parentRun.call(this._innerZone, () => { this._onTurnDoneEvents.emit(null); });
   }
 
   /**
@@ -255,7 +255,7 @@ export class NgZone {
 
   /** @internal */
   _notifyOnEventDone(): void {
-    this.runOutsideAngular(() => { this._onEventDoneEvents.next(null); });
+    this.runOutsideAngular(() => { this._onEventDoneEvents.emit(null); });
   }
 
   /**
@@ -440,7 +440,7 @@ export class NgZone {
         zone = zone.parent;
       }
       if (ObservableWrapper.hasSubscribers(this._onErrorEvents)) {
-        ObservableWrapper.callNext(this._onErrorEvents, new NgZoneError(e, trace));
+        ObservableWrapper.callEmit(this._onErrorEvents, new NgZoneError(e, trace));
       }
       if (isPresent(this._onErrorHandler)) {
         this._onErrorHandler(e, trace);