refactor(common): cleanup (#11668)

modules/@angular/common/src/directives/ng_plural.ts

@@ -61,8 +61,7 @@ export class NgPlural {
 
   addCase(value: string, switchView: SwitchView): void { this._caseViews[value] = switchView; }
 
-  /** @internal */
-  _updateView(): void {
+  private _updateView(): void {
     this._clearViews();
 
     const cases = Object.keys(this._caseViews);
@@ -70,13 +69,11 @@ export class NgPlural {
     this._activateView(this._caseViews[key]);
   }
 
-  /** @internal */
-  _clearViews() {
+  private _clearViews() {
     if (this._activeView) this._activeView.destroy();
   }
 
-  /** @internal */
-  _activateView(view: SwitchView) {
+  private _activateView(view: SwitchView) {
     if (view) {
       this._activeView = view;
       this._activeView.create();

modules/@angular/common/src/directives/ng_style.ts

@@ -32,10 +32,8 @@ import {Directive, DoCheck, ElementRef, Input, KeyValueChangeRecord, KeyValueDif
  */
 @Directive({selector: '[ngStyle]'})
 export class NgStyle implements DoCheck {
-  /** @internal */
-  _ngStyle: {[key: string]: string};
-  /** @internal */
-  _differ: KeyValueDiffer;
+  private _ngStyle: {[key: string]: string};
+  private _differ: KeyValueDiffer;
 
   constructor(
       private _differs: KeyValueDiffers, private _ngEl: ElementRef, private _renderer: Renderer) {}

modules/@angular/common/src/directives/ng_switch.ts

@@ -111,8 +111,7 @@ export class NgSwitch {
     }
   }
 
-  /** @internal */
-  _emptyAllActiveViews(): void {
+  private _emptyAllActiveViews(): void {
     const activeContainers = this._activeViews;
     for (var i = 0; i < activeContainers.length; i++) {
       activeContainers[i].destroy();
@@ -120,9 +119,7 @@ export class NgSwitch {
     this._activeViews = [];
   }
 
-  /** @internal */
-  _activateViews(views: SwitchView[]): void {
-    // TODO(vicb): assert(this._activeViews.length === 0);
+  private _activateViews(views: SwitchView[]): void {
     if (views) {
       for (var i = 0; i < views.length; i++) {
         views[i].create();
@@ -141,8 +138,7 @@ export class NgSwitch {
     views.push(view);
   }
 
-  /** @internal */
-  _deregisterView(value: any, view: SwitchView): void {
+  private _deregisterView(value: any, view: SwitchView): void {
     // `_CASE_DEFAULT` is used a marker for non-registered cases
     if (value === _CASE_DEFAULT) return;
     const views = this._valueViews.get(value);
@@ -181,10 +177,8 @@ export class NgSwitch {
 @Directive({selector: '[ngSwitchCase]'})
 export class NgSwitchCase {
   // `_CASE_DEFAULT` is used as a marker for a not yet initialized value
-  /** @internal */
-  _value: any = _CASE_DEFAULT;
-  /** @internal */
-  _view: SwitchView;
+  private _value: any = _CASE_DEFAULT;
+  private _view: SwitchView;
   private _switch: NgSwitch;
 
   constructor(