message: Swap out ElementScanner for Polymer2ElementScanner
diff: @@ -31,6 +31,7 @@ import {BehaviorScanner} from '../polymer/behavior-scanner';
  import {CssImportScanner} from '../polymer/css-import-scanner';
  import {DomModuleScanner} from '../polymer/dom-module-scanner';
  import {PolymerElementScanner} from '../polymer/polymer-element-scanner';
  +import {Polymer2ElementScanner} from '../polymer/polymer2-element-scanner';
  import {Polymer2MixinScanner} from '../polymer/polymer2-mixin-scanner';
  import {PseudoElementScanner} from '../polymer/pseudo-element-scanner';
  import {scan} from '../scanning/scan';
  @@ -39,7 +40,6 @@ import {TypeScriptAnalyzer} from '../typescript/typescript-analyzer';
  import {TypeScriptPreparser} from '../typescript/typescript-preparser';
  import {UrlLoader} from '../url-loader/url-loader';
  import {UrlResolver} from '../url-loader/url-resolver';
  -import {ElementScanner as VanillaElementScanner} from '../vanilla-custom-elements/element-scanner';
  import {Severity, Warning, WarningCarryingException} from '../warning/warning';
  import {AnalysisCache} from './analysis-cache';
  @@ -103,8 +103,8 @@ export class AnalysisContext {
  new PolymerElementScanner(),
  new Polymer2MixinScanner(),
  new BehaviorScanner(),
  - new VanillaElementScanner(),
  new NamespaceScanner(),
  + new Polymer2ElementScanner()
  ]
  ],
  ]);
  