chore(ts): fix TODOs that were pending on 1.6 upgrade

Closes #4377

modules/benchpress/src/metric.ts

@@ -1,14 +1,12 @@
 import {bind, Binding} from 'angular2/src/core/di';
 import {Promise, PromiseWrapper} from 'angular2/src/core/facade/async';
-import {ABSTRACT} from 'angular2/src/core/facade/lang';
 import {BaseException, WrappedException} from 'angular2/src/core/facade/exceptions';
 import {StringMap} from 'angular2/src/core/facade/collection';
 
 /**
  * A metric is measures values
  */
-@ABSTRACT()
-export class Metric {
+export abstract class Metric {
   static bindTo(delegateToken): Binding[] {
     return [bind(Metric).toFactory((delegate) => delegate, [delegateToken])];
   }

modules/benchpress/src/reporter.ts

@@ -1,14 +1,12 @@
 import {bind, Binding} from 'angular2/src/core/di';
 import {Promise, PromiseWrapper} from 'angular2/src/core/facade/async';
-import {ABSTRACT} from 'angular2/src/core/facade/lang';
 import {BaseException, WrappedException} from 'angular2/src/core/facade/exceptions';
 import {MeasureValues} from './measure_values';
 
 /**
  * A reporter reports measure values and the valid sample.
  */
-@ABSTRACT()
-export class Reporter {
+export abstract class Reporter {
   static bindTo(delegateToken): Binding[] {
     return [bind(Reporter).toFactory((delegate) => delegate, [delegateToken])];
   }

modules/benchpress/src/validator.ts

@@ -1,6 +1,5 @@
 import {bind, Binding} from 'angular2/src/core/di';
 import {StringMap} from 'angular2/src/core/facade/collection';
-import {ABSTRACT} from 'angular2/src/core/facade/lang';
 import {BaseException, WrappedException} from 'angular2/src/core/facade/exceptions';
 
 import {MeasureValues} from './measure_values';
@@ -10,8 +9,7 @@ import {MeasureValues} from './measure_values';
  * A valid sample is a sample that represents the population that should be observed
  * in the correct way.
  */
-@ABSTRACT()
-export class Validator {
+export abstract class Validator {
   static bindTo(delegateToken): Binding[] {
     return [bind(Validator).toFactory((delegate) => delegate, [delegateToken])];
   }

modules/benchpress/src/web_driver_adapter.ts

@@ -1,6 +1,5 @@
 import {bind, Binding} from 'angular2/src/core/di';
 import {Promise} from 'angular2/src/core/facade/async';
-import {ABSTRACT} from 'angular2/src/core/facade/lang';
 import {BaseException, WrappedException} from 'angular2/src/core/facade/exceptions';
 import {Map} from 'angular2/src/core/facade/collection';
 
@@ -9,8 +8,7 @@ import {Map} from 'angular2/src/core/facade/collection';
  * e.g. JS vs Dart Async vs Dart Sync webdriver.
  * Needs one implementation for every supported WebDriver client.
  */
-@ABSTRACT()
-export class WebDriverAdapter {
+export abstract class WebDriverAdapter {
   static bindTo(delegateToken): Binding[] {
     return [bind(WebDriverAdapter).toFactory((delegate) => delegate, [delegateToken])];
   }

modules/benchpress/src/web_driver_extension.ts

@@ -1,6 +1,6 @@
 import {bind, Binding, Injector, OpaqueToken} from 'angular2/src/core/di';
 
-import {ABSTRACT, isBlank, isPresent} from 'angular2/src/core/facade/lang';
+import {isBlank, isPresent} from 'angular2/src/core/facade/lang';
 import {BaseException, WrappedException} from 'angular2/src/core/facade/exceptions';
 import {Promise, PromiseWrapper} from 'angular2/src/core/facade/async';
 import {ListWrapper, StringMap} from 'angular2/src/core/facade/collection';
@@ -12,8 +12,7 @@ import {Options} from './common_options';
  * for a given browser, independent of the WebDriverAdapter.
  * Needs one implementation for every supported Browser.
  */
-@ABSTRACT()
-export class WebDriverExtension {
+export abstract class WebDriverExtension {
   static bindTo(childTokens): Binding[] {
     var res = [
       bind(_CHILDREN)