Fix closure compile after Polymer update

third_party/polymer/v1_0/chromium.patch

Index: third_party/polymer/v1_0/chromium.patch
diff --git a/third_party/polymer/v1_0/chromium.patch b/third_party/polymer/v1_0/chromium.patch
index 9b27dc9bc16847a6fd63fea2790edbe78b915916..64902013e17597df56bce3f780f5014fa4d6c438 100644
--- a/third_party/polymer/v1_0/chromium.patch
+++ b/third_party/polymer/v1_0/chromium.patch
@@ -23,3 +23,18 @@ index baf9ab3..985fe6c 100644
  },
  removeCustomPropAssignment: function (cssText) {
  return cssText.replace(this._rx.customProp, '').replace(this._rx.mixinProp, '');
+diff --git a/components-chromium/polymer-externs/polymer.externs.js b/components-chromium/polymer-externs/polymer.externs.js
+index e7d685d..0e950f9 100644
+--- a/components-chromium/polymer-externs/polymer.externs.js
++++ b/components-chromium/polymer-externs/polymer.externs.js
+@@ -464,6 +464,9 @@ PolymerElement.prototype.updateStyles = function(properties) {};
+  */
+ PolymerElement.prototype.customStyle;
+ 
++/** @type {Node|undefined} */
++PolymerElement.prototype.shadyRoot;
++
+ /**
+  * Logs a message to the console.
+  *
+