[Polymer] updating

third_party/polymer/v1_0/components-chromium/iron-a11y-keys-behavior/iron-a11y-keys-behavior-extracted.js

Index: third_party/polymer/v1_0/components-chromium/iron-a11y-keys-behavior/iron-a11y-keys-behavior-extracted.js
diff --git a/third_party/polymer/v1_0/components-chromium/iron-a11y-keys-behavior/iron-a11y-keys-behavior-extracted.js b/third_party/polymer/v1_0/components-chromium/iron-a11y-keys-behavior/iron-a11y-keys-behavior-extracted.js
index da5c8adb555800c596656cdb1ba064112f631ca5..bb7f399654d27c836447fbe5dcc85a8d344f29cf 100644
--- a/third_party/polymer/v1_0/components-chromium/iron-a11y-keys-behavior/iron-a11y-keys-behavior-extracted.js
+++ b/third_party/polymer/v1_0/components-chromium/iron-a11y-keys-behavior/iron-a11y-keys-behavior-extracted.js
@@ -163,12 +163,16 @@
       * To get @ returned, set noSpecialChars = false
      */
     function normalizedKeyForEvent(keyEvent, noSpecialChars) {
-      // Fall back from .key, to .keyIdentifier, to .keyCode, and then to
-      // .detail.key to support artificial keyboard events.
-      return transformKey(keyEvent.key, noSpecialChars) ||
-        transformKeyIdentifier(keyEvent.keyIdentifier) ||
-        transformKeyCode(keyEvent.keyCode) ||
-        transformKey(keyEvent.detail ? keyEvent.detail.key : keyEvent.detail, noSpecialChars) || '';
+      // Fall back from .key, to .detail.key for artifical keyboard events,
+      // and then to deprecated .keyIdentifier and .keyCode.
+      if (keyEvent.key) {
+        return transformKey(keyEvent.key, noSpecialChars);
+      }
+      if (keyEvent.detail && keyEvent.detail.key) {
+        return transformKey(keyEvent.detail.key, noSpecialChars);
+      }
+      return transformKeyIdentifier(keyEvent.keyIdentifier) ||
+        transformKeyCode(keyEvent.keyCode) || '';
     }
 
     function keyComboMatchesEvent(keyCombo, event) {