cleanup(core): making @view optional

Closes angular#4566

Author: vsavkin

modules/angular2/test/core/linker/integration_spec.ts

@@ -1701,7 +1701,7 @@ export function main() {
          inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder, async) => {
            tcb.overrideView(MyComp, new ViewMetadata({
                               template: '<component-with-template></component-with-template>',
-                              directives: [ComponentWithTempalte]
+                              directives: [ComponentWithTemplate]
                             }))
                .createAsync(MyComp)
                .then((rootTC) => {
@@ -2270,7 +2270,7 @@ class DirectiveThrowingAnError {
   selector: 'component-with-template',
   directives: [NgFor], template: `No View Decorator: <div *ng-for="#item of items">{{item}}</div>`
 })
-class ComponentWithTempalte {
+class ComponentWithTemplate {
   items = [1, 2, 3];
 }
 

modules/angular2/test/core/linker/view_resolver_spec.ts

@@ -26,15 +26,15 @@ class ComponentWithTemplate {
 class ComponentWithViewTemplate {
 }
 
-@Component({selector: 'sample'})
-class ComponentWithoutView {
-}
-
 @Component({selector: 'sample', templateUrl: "some template url"})
 @View({template: "some template"})
 class ComponentWithViewTemplateUrl {
 }
 
+@Component({selector: 'sample'})
+class ComponentWithoutView {
+}
+
 @View({template: "some template"})
 class ClassWithView {
 }

modules/examples/src/hello_world/index.ts

@@ -1,5 +1,5 @@
 import {bootstrap} from 'angular2/bootstrap';
-import {ElementRef, Component, Directive, View, Injectable} from 'angular2/core';
+import {ElementRef, Component, Directive, Injectable} from 'angular2/core';
 import {Renderer} from 'angular2/render';
 
 export function main() {

modules_dart/transform/lib/src/transform/template_compiler/compile_data_creator.dart

@@ -195,7 +195,6 @@ class _DirectiveDependenciesVisitor extends Object
   /// reflector.
   @override
   Object visitInstanceCreationExpression(InstanceCreationExpression node) {
-//    if (_isViewAnnotation(node)) {
     if (_isViewAnnotation(node) || _isComponentAnnotation(node)) {
       compileData = new NormalizedComponentWithViewDirectives(
           null, <CompileDirectiveMetadata>[]);