From 919251487f5fef900573373681e21964f5fddc8a Mon Sep 17 00:00:00 2001
From: Steven Orvell <sorvell@google.com>
Date: Thu, 2 Feb 2017 11:23:41 -0800
Subject: [PATCH] Prevent annotator from removing the `is-inert` attribute.

---
 src/lib/annotations/annotations.html | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/lib/annotations/annotations.html b/src/lib/annotations/annotations.html
index 8d0ed853c2..d9b11b9291 100644
--- a/src/lib/annotations/annotations.html
+++ b/src/lib/annotations/annotations.html
@@ -65,6 +65,8 @@
   // null-array (shared empty array to avoid null-checks)
   Polymer.nar = [];
 
+  var inertEnabled = Polymer.Settings.enableInert;
+
   Polymer.Annotations = {
 
     // preprocess-time
@@ -367,7 +369,11 @@
           node.setAttribute(origName, '');
         }
         // Remove annotation
-        node.removeAttribute(origName);
+        if (inertEnabled && origName === 'is-inert') {
+          node.setAttribute('is-inert', '');
+        } else {
+          node.removeAttribute(origName);
+        }
         // Case hackery: attributes are lower-case, but bind targets
         // (properties) are case sensitive. Gambit is to map dash-case to
         // camel-case: `foo-bar` becomes `fooBar`.