DevTools: Inspect element mode does not select element in ShadowDOM

Source/devtools/front_end/DOMBreakpointsSidebarPane.js

Index: Source/devtools/front_end/DOMBreakpointsSidebarPane.js
diff --git a/Source/devtools/front_end/DOMBreakpointsSidebarPane.js b/Source/devtools/front_end/DOMBreakpointsSidebarPane.js
index 68f1328e25086a5e7ce8c77bb748e9c40e0295ea..542d04728cd6250b3124acdc7c6652e9a0047b8d 100644
--- a/Source/devtools/front_end/DOMBreakpointsSidebarPane.js
+++ b/Source/devtools/front_end/DOMBreakpointsSidebarPane.js
@@ -153,10 +153,11 @@ WebInspector.DOMBreakpointsSidebarPane.prototype = {
     {
         var node = event.data.node;
         this._removeBreakpointsForNode(event.data.node);
-        if (!node.children)
+        var children = node.children();
+        if (!children)
             return;
-        for (var i = 0; i < node.children.length; ++i)
-            this._removeBreakpointsForNode(node.children[i]);
+        for (var i = 0; i < children.length; ++i)
+            this._removeBreakpointsForNode(children[i]);
         this._saveBreakpoints();
     },