Devtools: Use Event.deepPath as a function if available.

third_party/WebKit/Source/devtools/front_end/ui/Tooltip.js

Index: third_party/WebKit/Source/devtools/front_end/ui/Tooltip.js
diff --git a/third_party/WebKit/Source/devtools/front_end/ui/Tooltip.js b/third_party/WebKit/Source/devtools/front_end/ui/Tooltip.js
index 0739889fa11d4f1242db70e642d52898bb2b1f1b..7d7b3533acb0392c01f0273cc96a9b9df8f78b99 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui/Tooltip.js
+++ b/third_party/WebKit/Source/devtools/front_end/ui/Tooltip.js
@@ -33,7 +33,7 @@ WebInspector.Tooltip.prototype = {
      */
     _mouseMove: function(event)
     {
-        var path = event.deepPath ? event.deepPath : event.path;
+        var path = event.deepPath && typeof event.deepPath == "function" ? event.deepPath() : event.path;

[pfeldman, 2016/02/01 22:52:17]

You just made it undefined, no point in checking for it anymore, right?

[samli, 2016/02/03 00:07:11]

True, but I wanted to be able to remove the bit in devtools.js at a later point
and use deepPath().

         if (!path || event.buttons !== 0)
             return;