DevTools: Speculatively patch DevTools to make CodeSchool extension work.

Source/devtools/front_end/HeapSnapshotView.js

Index: Source/devtools/front_end/HeapSnapshotView.js
diff --git a/Source/devtools/front_end/HeapSnapshotView.js b/Source/devtools/front_end/HeapSnapshotView.js
index 5574b3586f0cfd52450cbb336ea61933ef955670..0af9f996e1b09098d15a4119c0cbc1e6f058d9b2 100644
--- a/Source/devtools/front_end/HeapSnapshotView.js
+++ b/Source/devtools/front_end/HeapSnapshotView.js
@@ -863,6 +863,12 @@ WebInspector.HeapSnapshotView.prototype = {
     _onSelectedPerspectiveChanged: function(event)
     {
         this._changePerspective(event.target.selectedIndex);
+        // FIXME: This is needed by CodeSchool extension.
+        this._onSelectedViewChanged(event);
+    },
+
+    _onSelectedViewChanged: function(event)
+    {
     },
 
     _changePerspective: function(selectedIndex)