DevTools: Fix regression that slows down "Goto Source" dialog

Source/devtools/front_end/console/ConsoleView.js

Index: Source/devtools/front_end/console/ConsoleView.js
diff --git a/Source/devtools/front_end/console/ConsoleView.js b/Source/devtools/front_end/console/ConsoleView.js
index ed272511dec2ae6275a28bd294efb17047ed3541..a28b8b69bf8fa1c1d6f59a66a638c301c3b7de2e 100644
--- a/Source/devtools/front_end/console/ConsoleView.js
+++ b/Source/devtools/front_end/console/ConsoleView.js
@@ -160,6 +160,15 @@ WebInspector.ConsoleView.prototype = {
     },
 
     /**
+     * @param {number} index
+     * @return {number}
+     */
+    fastHeight: function(index)
+    {
+        return this._visibleViewMessages[index].fastHeight();
+    },
+
+    /**
      * @param {!WebInspector.Target} target
      */
     targetAdded: function(target)