Redesign cast-mode-picker UX and switch to core/paper elements.

chrome/browser/resources/media_router/media_router.js

Index: chrome/browser/resources/media_router/media_router.js
diff --git a/chrome/browser/resources/media_router/media_router.js b/chrome/browser/resources/media_router/media_router.js
index e24c1a7f61f134d22d94a0ed4a1a9663dfb1a66c..82cb1649e8c363ac0e3d68da3dd796444b976dd4 100644
--- a/chrome/browser/resources/media_router/media_router.js
+++ b/chrome/browser/resources/media_router/media_router.js
@@ -23,7 +23,6 @@ cr.define('media_router', function() {
     container = $('media-router-container');
     media_router.ui.setContainer(container);
 
-    container.addEventListener('cast-mode-click', onCastModeClick);
     container.addEventListener('close-button-click', onCloseDialogClick);
     container.addEventListener('close-route-click', onCloseRouteClick);
     container.addEventListener('create-route', onCreateRoute);
@@ -31,20 +30,6 @@ cr.define('media_router', function() {
   }
 
   /**
-   * Changes the UI, such as the the header text, in response to a cast mode
-   * change.
-   * Called when the user selects a cast mode.
-   *
-   * @param {{detail: {headerText: string}}} data
-   * Parameters in |data|.detail:
-   *   headerText - the new header text corresponding to the selected
-   *                cast mode.
-   */
-  function onCastModeClick(data) {
-    container.headerText = data.detail.headerText;
-  }
-
-  /**
    * Closes the dialog.
    * Called when the user clicks the close button on the dialog.
    */