From 3ee521597f30518912cf9f3b46a3cbf714b15f5b Mon Sep 17 00:00:00 2001
From: Patrick Hulce <patrick.hulce@gmail.com>
Date: Wed, 5 Jul 2017 10:33:53 -0500
Subject: [PATCH] fix(domstats): enable DOM domain (#2640)

---
 lighthouse-core/gather/gatherers/dobetterweb/domstats.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lighthouse-core/gather/gatherers/dobetterweb/domstats.js b/lighthouse-core/gather/gatherers/dobetterweb/domstats.js
index b0490ff5e8..93187fc2f6 100644
--- a/lighthouse-core/gather/gatherers/dobetterweb/domstats.js
+++ b/lighthouse-core/gather/gatherers/dobetterweb/domstats.js
@@ -137,10 +137,11 @@ class DOMStats extends Gatherer {
       ${elementPathInDOM.toString()};
       return (${getDOMStats.toString()}(document.documentElement));
     })()`;
-    return options.driver.evaluateAsync(expression)
+    return options.driver.sendCommand('DOM.enable')
+      .then(() => options.driver.evaluateAsync(expression))
       .then(results => options.driver.getElementsInDocument().then(allNodes => {
         results.totalDOMNodes = allNodes.length;
-        return results;
+        return options.driver.sendCommand('DOM.disable').then(() => results);
       }));
   }
 }