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

BREAKING CHANGE:

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

Closes #4287

Closes #5302

modules/angular2/test/web_workers/shared/message_bus_spec.ts

@@ -37,7 +37,7 @@ export function main() {
            async.done();
          });
          var toEmitter = bus.to(CHANNEL);
-         ObservableWrapper.callNext(toEmitter, MESSAGE);
+         ObservableWrapper.callEmit(toEmitter, MESSAGE);
        }));
 
     it("should broadcast", inject([AsyncTestCompleter], (async) => {
@@ -61,7 +61,7 @@ export function main() {
          }
 
          var toEmitter = bus.to(CHANNEL);
-         ObservableWrapper.callNext(toEmitter, MESSAGE);
+         ObservableWrapper.callEmit(toEmitter, MESSAGE);
        }));
 
     it("should keep channels independent", inject([AsyncTestCompleter], (async) => {
@@ -91,10 +91,10 @@ export function main() {
          });
 
          var firstToEmitter = bus.to(CHANNEL_ONE);
-         ObservableWrapper.callNext(firstToEmitter, MESSAGE_ONE);
+         ObservableWrapper.callEmit(firstToEmitter, MESSAGE_ONE);
 
          var secondToEmitter = bus.to(CHANNEL_TWO);
-         ObservableWrapper.callNext(secondToEmitter, MESSAGE_TWO);
+         ObservableWrapper.callEmit(secondToEmitter, MESSAGE_TWO);
        }));
   });
 
@@ -121,7 +121,7 @@ export function main() {
 
          var wasCalled = false;
          ObservableWrapper.subscribe(bus.from(CHANNEL), (message) => { wasCalled = true; });
-         ObservableWrapper.callNext(bus.to(CHANNEL), "hi");
+         ObservableWrapper.callEmit(bus.to(CHANNEL), "hi");
 
 
          flushMessages(() => {
@@ -141,7 +141,7 @@ export function main() {
 
          var wasCalled = false;
          ObservableWrapper.subscribe(bus.from(CHANNEL), (message) => { wasCalled = true; });
-         ObservableWrapper.callNext(bus.to(CHANNEL), "hi");
+         ObservableWrapper.callEmit(bus.to(CHANNEL), "hi");
 
          flushMessages(() => {
            expect(wasCalled).toBeTruthy();

modules/angular2/test/web_workers/shared/mock_event_emitter.ts

@@ -10,7 +10,7 @@ export class MockEventEmitter<T> extends EventEmitter<T> {
     return new MockDisposable();
   }
 
-  next(value: any) { this._nextFns.forEach(fn => fn(value)); }
+  emit(value: any) { this._nextFns.forEach(fn => fn(value)); }
 }
 
 class MockDisposable {

modules/angular2/test/web_workers/shared/service_message_broker_spec.ts

@@ -53,7 +53,7 @@ export function main() {
            expect(arg1).toEqual(PASSED_ARG_1);
            expect(arg2).toEqual(PASSED_ARG_2);
          });
-         ObservableWrapper.callNext(messageBuses.worker.to(CHANNEL),
+         ObservableWrapper.callEmit(messageBuses.worker.to(CHANNEL),
                                     {'method': TEST_METHOD, 'args': [PASSED_ARG_1, PASSED_ARG_2]});
        }));
 
@@ -63,7 +63,7 @@ export function main() {
            expect(arg1).toEqual(PASSED_ARG_1);
            return PromiseWrapper.wrap(() => { return RESULT; });
          });
-         ObservableWrapper.callNext(messageBuses.worker.to(CHANNEL),
+         ObservableWrapper.callEmit(messageBuses.worker.to(CHANNEL),
                                     {'method': TEST_METHOD, 'id': ID, 'args': [PASSED_ARG_1]});
          ObservableWrapper.subscribe(messageBuses.worker.from(CHANNEL), (data: any) => {
            expect(data.type).toEqual("result");

modules/angular2/test/web_workers/worker/event_dispatcher_spec.ts

@@ -52,7 +52,7 @@ export function main() {
              serializer.deserialize(serializer.serialize(viewRef, RenderViewRef), RenderViewRef);
          webWorkerEventDispatcher.registerEventDispatcher(viewRef, eventDispatcher);
 
-         ObservableWrapper.callNext(messageBuses.ui.to(EVENT_CHANNEL), {
+         ObservableWrapper.callEmit(messageBuses.ui.to(EVENT_CHANNEL), {
            'viewRef': viewRef.serialize(),
            'elementIndex': elementIndex,
            'eventName': eventName,