refactor: dart

modules/@angular/compiler/src/directive_normalizer.ts

@@ -215,8 +215,6 @@ class TemplatePreparseVisitor implements html.Visitor {
         this.styleUrls.push(preparsedElement.hrefAttr);
         break;
       default:
-        // DDC reports this as error. See:
-        // https://github.com/dart-lang/dev_compiler/issues/428
         break;
     }
     if (preparsedElement.nonBindable) {

modules/@angular/compiler/src/output/abstract_emitter.ts

@@ -201,7 +201,6 @@ export abstract class AbstractEmitterVisitor implements o.StatementVisitor, o.Ex
       name = this.getBuiltinMethodName(expr.builtin);
       if (isBlank(name)) {
         // some builtins just mean to skip the call.
-        // e.g. `bind` in Dart.
         return null;
       }
     }

modules/@angular/compiler/src/output/output_interpreter.ts

@@ -11,7 +11,6 @@ import {ListWrapper} from '../facade/collection';
 import {BaseException, unimplemented} from '../facade/exceptions';
 import {isPresent} from '../facade/lang';
 
-import {debugOutputAstAsDart} from './dart_emitter';
 import * as o from './output_ast';
 import {debugOutputAstAsTypeScript} from './ts_emitter';
 

modules/@angular/compiler/src/selector.ts

@@ -12,9 +12,7 @@ import {RegExpMatcherWrapper, RegExpWrapper, StringWrapper, isBlank, isPresent}
 
 const _EMPTY_ATTR_VALUE = '';
 
-// TODO: Can't use `const` here as
-// in Dart this is not transpiled into `final` yet...
-var _SELECTOR_REGEXP = RegExpWrapper.create(
+const _SELECTOR_REGEXP = RegExpWrapper.create(
     '(\\:not\\()|' +                          //":not("
     '([-\\w]+)|' +                            // "tag"
     '(?:\\.([-\\w]+))|' +                     // ".class"