Implement the inert attribute

third_party/WebKit/Source/core/dom/Node.cpp

Index: third_party/WebKit/Source/core/dom/Node.cpp
diff --git a/third_party/WebKit/Source/core/dom/Node.cpp b/third_party/WebKit/Source/core/dom/Node.cpp
index a7f51f704a679c10db793f474762e3b0348a759a..72a7872e7328c1fd068f6eaa6c02680dcb7b828a 100644
--- a/third_party/WebKit/Source/core/dom/Node.cpp
+++ b/third_party/WebKit/Source/core/dom/Node.cpp
@@ -770,6 +770,16 @@ bool Node::isInert() const
     const HTMLDialogElement* dialog = document().activeModalDialog();
     if (dialog && this != document() && (!canParticipateInFlatTree() || !FlatTreeTraversal::containsIncludingPseudoElement(*dialog, *this)))
         return true;
+
+    if (RuntimeEnabledFeatures::inertAttributeEnabled()) {
+        const Node* n = this;

[esprehn, 2016/06/27 22:27:15]

node, don't abbreviate

[aboxhall, 2016/06/29 00:13:12]

Done.

+        do {
+            if (n->isElementNode() && toElement(n)->hasAttribute(HTMLNames::inertAttr))

[esprehn, 2016/06/27 22:27:15]

I think you want instead use node.parentOrShadowHostElement() ?

That'll loop over all of the ancestor elements

[aboxhall, 2016/06/27 23:59:22]

Where do I want to do that, sorry?

[esprehn, 2016/06/28 18:55:07]

Your loop should be over parentOrShadowHostElement() instead of
parentOrShadowHostNode().

[aboxhall, 2016/06/29 00:13:12]

Done.

+                return true;
+            n = n->parentOrShadowHostNode();
+        } while (n);
+    }
+
     return document().localOwner() && document().localOwner()->isInert();
 }