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/common/forms/directives/ng_control_name.ts

@@ -117,7 +117,7 @@ export class NgControlName extends NgControl implements OnChanges,
 
   viewToModelUpdate(newValue: any): void {
     this.viewModel = newValue;
-    ObservableWrapper.callNext(this.update, newValue);
+    ObservableWrapper.callEmit(this.update, newValue);
   }
 
   get path(): string[] { return controlPath(this.name, this._parent); }

modules/angular2/src/common/forms/directives/ng_form.ts

@@ -160,7 +160,7 @@ export class NgForm extends ControlContainer implements Form {
   }
 
   onSubmit(): boolean {
-    ObservableWrapper.callNext(this.ngSubmit, null);
+    ObservableWrapper.callEmit(this.ngSubmit, null);
     return false;
   }
 

modules/angular2/src/common/forms/directives/ng_form_control.ts

@@ -110,7 +110,7 @@ export class NgFormControl extends NgControl implements OnChanges {
 
   viewToModelUpdate(newValue: any): void {
     this.viewModel = newValue;
-    ObservableWrapper.callNext(this.update, newValue);
+    ObservableWrapper.callEmit(this.update, newValue);
   }
 
   private _isControlChanged(changes: {[key: string]: any}): boolean {

modules/angular2/src/common/forms/directives/ng_form_model.ts

@@ -157,7 +157,7 @@ export class NgFormModel extends ControlContainer implements Form,
   }
 
   onSubmit(): boolean {
-    ObservableWrapper.callNext(this.ngSubmit, null);
+    ObservableWrapper.callEmit(this.ngSubmit, null);
     return false;
   }
 

modules/angular2/src/common/forms/directives/ng_model.ts

@@ -86,6 +86,6 @@ export class NgModel extends NgControl implements OnChanges {
 
   viewToModelUpdate(newValue: any): void {
     this.viewModel = newValue;
-    ObservableWrapper.callNext(this.update, newValue);
+    ObservableWrapper.callEmit(this.update, newValue);
   }
 }

modules/angular2/src/common/forms/model.ts

@@ -128,8 +128,8 @@ export abstract class AbstractControl {
     }
 
     if (emitEvent) {
-      ObservableWrapper.callNext(this._valueChanges, this._value);
-      ObservableWrapper.callNext(this._statusChanges, this._status);
+      ObservableWrapper.callEmit(this._valueChanges, this._value);
+      ObservableWrapper.callEmit(this._statusChanges, this._status);
     }
 
     if (isPresent(this._parent) && !onlySelf) {
@@ -185,7 +185,7 @@ export abstract class AbstractControl {
     this._status = this._calculateStatus();
 
     if (emitEvent) {
-      ObservableWrapper.callNext(this._statusChanges, this._status);
+      ObservableWrapper.callEmit(this._statusChanges, this._status);
     }
 
     if (isPresent(this._parent)) {