Bug 1270387 - Disable Node.rootNode in release builds due to web compatibility issues. r=smaug

MozReview-Commit-ID: Gc2XGuFAYlD

--HG--
extra : rebase_source : 903fd104b36839b2fac27e0e67364abb95cec9ce

dom/webidl/Node.webidl

@@ -36,7 +36,7 @@ interface Node : EventTarget {
 
   [Pure]
   readonly attribute Document? ownerDocument;
-  [Pure]
+  [Pure, Pref="dom.node.rootNode.enabled"]
   readonly attribute Node rootNode;
   [Pure]
   readonly attribute Node? parentNode;

modules/libpref/init/all.js

@@ -5335,3 +5335,10 @@ pref("dom.mozBrowserFramesEnabled", false);
 
 // Is support for 'color-adjust' CSS property enabled?
 pref("layout.css.color-adjust.enabled", true);
+
+// Disable Node.rootNode in release builds.
+#ifdef RELEASE_BUILD
+pref("dom.node.rootNode.enabled", false);
+#else
+pref("dom.node.rootNode.enabled", true);
+#endif

testing/web-platform/meta/dom/interfaces.html.ini

@@ -1,5 +1,6 @@
 [interfaces.html]
   type: testharness
+  prefs: [dom.node.rootNode.enabled:true]
   [MutationObserver interface: operation observe(Node,MutationObserverInit)]
     expected: FAIL
 

testing/web-platform/meta/dom/nodes/rootNode.html.ini

@@ -0,0 +1,3 @@
+[rootNode.html]
+  type: testharness
+  prefs: [dom.node.rootNode.enabled:true]