DevTools: Fix illegal argument types in ViewportControl

Source/devtools/front_end/ui/ViewportControl.js

Index: Source/devtools/front_end/ui/ViewportControl.js
diff --git a/Source/devtools/front_end/ui/ViewportControl.js b/Source/devtools/front_end/ui/ViewportControl.js
index 80fc0820200c41a3a01b411bab206c377cfd44df..c62a3ec9d5d931342696a50ab1123786d9cf43ff 100644
--- a/Source/devtools/front_end/ui/ViewportControl.js
+++ b/Source/devtools/front_end/ui/ViewportControl.js
@@ -319,7 +319,7 @@ WebInspector.ViewportControl.prototype = {
             headOffset = this._selectionIsBackward ? 0 : 1;
         }
 
-        selection.setBaseAndExtent(anchorElement, anchorOffset, headElement, headOffset);
+        selection.setBaseAndExtent(anchorElement || null, anchorOffset, headElement || null, headOffset);

[lushnikov, 2014/06/17 08:15:36]

Can't we initialize anchorElement and headElement with null by default?

[apavlov, 2014/06/17 08:27:18]

Done.

     },
 
     refresh: function()
@@ -439,7 +439,7 @@ WebInspector.ViewportControl.prototype = {
             return 0;
         var chars = 0;
         var node = itemElement;
-        while ((node = node.traverseNextTextNode(true)) && node !== container)
+        while ((node = node.traverseNextTextNode()) && node !== container)
             chars += node.textContent.length;
         return chars + offset;
     },