Device emulator: Replace usage of paper-dialog with cr-dialog.

chrome/browser/resources/chromeos/emulator/audio_settings.js

Index: chrome/browser/resources/chromeos/emulator/audio_settings.js
diff --git a/chrome/browser/resources/chromeos/emulator/audio_settings.js b/chrome/browser/resources/chromeos/emulator/audio_settings.js
index 08ef9c230bcd53ff07708f00ed72e2f3a7ca19c2..712eab021871e250939da2d9076d943df7b98b3b 100644
--- a/chrome/browser/resources/chromeos/emulator/audio_settings.js
+++ b/chrome/browser/resources/chromeos/emulator/audio_settings.js
@@ -160,6 +160,7 @@ Polymer({
     // in |node|.
     var node = this.nodes[this.currentEditIndex];
     chrome.send('insertAudioNode', [node]);
+    this.$.editDialog.close();
   },
 
   /**
@@ -199,7 +200,7 @@ Polymer({
     var index = event.model.index;
     this.currentEditIndex = index;
     this.currentEditableObject = this.nodes[index];
-    this.$.editDialog.toggle();
+    this.$.editDialog.showModal();
   },
 
   /**