refactor(abstract): Use abstract keyword where possible to decrease file size. (#14112)

PR Close: #14112

modules/@angular/core/src/linker/component_factory.ts

@@ -8,7 +8,6 @@
 
 import {ChangeDetectorRef} from '../change_detection/change_detection';
 import {Injector} from '../di/injector';
-import {unimplemented} from '../facade/errors';
 import {Type} from '../type';
 
 import {ElementRef} from './element_ref';
@@ -30,32 +29,32 @@ export abstract class ComponentRef<C> {
   /**
    * Location of the Host Element of this Component Instance.
    */
-  get location(): ElementRef { return unimplemented(); }
+  abstract get location(): ElementRef;
 
   /**
    * The injector on which the component instance exists.
    */
-  get injector(): Injector { return unimplemented(); }
+  abstract get injector(): Injector;
 
   /**
    * The instance of the Component.
    */
-  get instance(): C { return unimplemented(); };
+  abstract get instance(): C;
 
   /**
    * The {@link ViewRef} of the Host View of this Component instance.
    */
-  get hostView(): ViewRef { return unimplemented(); };
+  abstract get hostView(): ViewRef;
 
   /**
    * The {@link ChangeDetectorRef} of the Component instance.
    */
-  get changeDetectorRef(): ChangeDetectorRef { return unimplemented(); }
+  abstract get changeDetectorRef(): ChangeDetectorRef;
 
   /**
    * The component type.
    */
-  get componentType(): Type<any> { return unimplemented(); }
+  abstract get componentType(): Type<any>;
 
   /**
    * Destroys the component instance and all of the data structures associated with it.

modules/@angular/core/src/linker/ng_module_factory.ts

@@ -7,7 +7,6 @@
  */
 
 import {Injector, THROW_IF_NOT_FOUND} from '../di/injector';
-import {unimplemented} from '../facade/errors';
 import {stringify} from '../facade/lang';
 import {Type} from '../type';
 import {ComponentFactory} from './component_factory';
@@ -27,18 +26,18 @@ export abstract class NgModuleRef<T> {
   /**
    * The injector that contains all of the providers of the NgModule.
    */
-  get injector(): Injector { return unimplemented(); }
+  abstract get injector(): Injector;
 
   /**
    * The ComponentFactoryResolver to get hold of the ComponentFactories
    * declared in the `entryComponents` property of the module.
    */
-  get componentFactoryResolver(): ComponentFactoryResolver { return unimplemented(); }
+  abstract get componentFactoryResolver(): ComponentFactoryResolver;
 
   /**
    * The NgModule instance.
    */
-  get instance(): T { return unimplemented(); }
+  abstract get instance(): T;
 
   /**
    * Destroys the module instance and all of the data structures associated with it.

modules/@angular/core/src/linker/template_ref.ts

@@ -37,7 +37,7 @@ export abstract class TemplateRef<C> {
    *
    */
   // TODO(i): rename to anchor or location
-  get elementRef(): ElementRef { return null; }
+  abstract get elementRef(): ElementRef;
 
   abstract createEmbeddedView(context: C): EmbeddedViewRef<C>;
 }

modules/@angular/core/src/linker/view_container_ref.ts

@@ -7,7 +7,6 @@
  */
 
 import {Injector} from '../di/injector';
-import {unimplemented} from '../facade/errors';
 import {isPresent} from '../facade/lang';
 import {WtfScopeFn, wtfCreateScope, wtfLeave} from '../profile/profile';
 
@@ -42,11 +41,11 @@ export abstract class ViewContainerRef {
    * Anchor element that specifies the location of this container in the containing View.
    * <!-- TODO: rename to anchorElement -->
    */
-  get element(): ElementRef { return <ElementRef>unimplemented(); }
+  abstract get element(): ElementRef;
 
-  get injector(): Injector { return <Injector>unimplemented(); }
+  abstract get injector(): Injector;
 
-  get parentInjector(): Injector { return <Injector>unimplemented(); }
+  abstract get parentInjector(): Injector;
 
   /**
    * Destroys all Views in this container.
@@ -61,7 +60,7 @@ export abstract class ViewContainerRef {
   /**
    * Returns the number of Views currently attached to this container.
    */
-  get length(): number { return <number>unimplemented(); };
+  abstract get length(): number;
 
   /**
    * Instantiates an Embedded View based on the {@link TemplateRef `templateRef`} and inserts it

modules/@angular/core/src/linker/view_ref.ts

@@ -9,7 +9,6 @@
 import {AnimationQueue} from '../animation/animation_queue';
 import {ChangeDetectorRef} from '../change_detection/change_detector_ref';
 import {ChangeDetectorStatus} from '../change_detection/constants';
-import {unimplemented} from '../facade/errors';
 import {AppView} from './view';
 
 /**
@@ -21,7 +20,7 @@ export abstract class ViewRef extends ChangeDetectorRef {
    */
   abstract destroy(): void;
 
-  get destroyed(): boolean { return <boolean>unimplemented(); }
+  abstract get destroyed(): boolean;
 
   abstract onDestroy(callback: Function): any /** TODO #9100 */;
 }
@@ -81,9 +80,9 @@ export abstract class ViewRef extends ChangeDetectorRef {
  * @experimental
  */
 export abstract class EmbeddedViewRef<C> extends ViewRef {
-  get context(): C { return unimplemented(); }
+  abstract get context(): C;
 
-  get rootNodes(): any[] { return <any[]>unimplemented(); };
+  abstract get rootNodes(): any[];
 }
 
 export class ViewRef_<C> implements EmbeddedViewRef<C>, ChangeDetectorRef {