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third_party/polymer/components/iron-input/iron-input.html

Index: third_party/polymer/components/iron-input/iron-input.html
diff --git a/third_party/polymer/components/iron-input/iron-input.html b/third_party/polymer/components/iron-input/iron-input.html
index 3424b64a3a458d0e18807b3594cda6d355ccde1b..ddb5277ef464d760fc6a0ebe947d5860e87fd8b4 100644
--- a/third_party/polymer/components/iron-input/iron-input.html
+++ b/third_party/polymer/components/iron-input/iron-input.html
@@ -108,7 +108,6 @@ is separate from validation, and `allowed-pattern` does not affect how the input
       'keypress': '_onKeypress'
     },
 
-    /** @suppress {checkTypes} */
     registered: function() {
       // Feature detect whether we need to patch dispatchEvent (i.e. on FF and IE).
       if (!this._canDispatchEventOnDisabled()) {
@@ -137,7 +136,12 @@ is separate from validation, and `allowed-pattern` does not affect how the input
       return canDispatch;
     },
 
-    _dispatchEventFirefoxIE: function() {
+    /**
+     * @this {Node}
+     * @param {!Event} event
+     * @return {boolean}
+     */
+    _dispatchEventFirefoxIE: function(event) {
       // Due to Firefox bug, events fired on disabled form controls can throw
       // errors; furthermore, neither IE nor Firefox will actually dispatch
       // events from disabled form controls; as such, we toggle disable around
@@ -145,8 +149,9 @@ is separate from validation, and `allowed-pattern` does not affect how the input
       // See issue #47 for details
       var disabled = this.disabled;
       this.disabled = false;
-      this._origDispatchEvent.apply(this, arguments);
+      var defaultPrevented = this._origDispatchEvent(event);
       this.disabled = disabled;
+      return defaultPrevented
     },
 
     get _patternRegExp() {