refactor: change provide(...) for {provide: ...}

- provide() is deprecated,
- {} syntax is required by the offline compiler

modules/@angular/http/testing/mock_backend.ts

@@ -81,7 +81,7 @@ export class MockConnection implements Connection {
    * Emits the provided error object as an error to the {@link Response} {@link EventEmitter}
    * returned
    * from {@link Http}.
-   * 
+   *
    * ### Example
    *
    * ```
@@ -90,7 +90,7 @@ export class MockConnection implements Connection {
    * http.request('data.json').subscribe(res => res, err => console.log(err)));
    * connection.mockError(new Error('error'));
    * ```
-   * 
+   *
    */
   mockError(err?: Error) {
     // Matches XHR semantics
@@ -114,9 +114,9 @@ export class MockConnection implements Connection {
  *   var connection;
  *   var injector = Injector.resolveAndCreate([
  *     MockBackend,
- *     provide(Http, {useFactory: (backend, options) => {
+ *     {provide: Http, useFactory: (backend, options) => {
  *       return new Http(backend, options);
- *     }, deps: [MockBackend, BaseRequestOptions]})]);
+ *     }, deps: [MockBackend, BaseRequestOptions]}]);
  *   var http = injector.get(Http);
  *   var backend = injector.get(MockBackend);
  *   //Assign any newly-created connection to local variable
@@ -150,9 +150,9 @@ export class MockBackend implements ConnectionBackend {
    *   var text; //this will be set from mock response
    *   var injector = Injector.resolveAndCreate([
    *     MockBackend,
-   *     provide(Http, {useFactory: (backend, options) => {
+   *     {provide: Http, useFactory: (backend, options) => {
    *       return new Http(backend, options);
-   *     }, deps: [MockBackend, BaseRequestOptions]})]);
+   *     }, deps: [MockBackend, BaseRequestOptions]}]);
    *   var backend = injector.get(MockBackend);
    *   var http = injector.get(Http);
    *   backend.connections.subscribe(c => connection = c);