Add a DevTools command to create an isolated world for a given frame

third_party/WebKit/Source/bindings/core/v8/ScriptController.h

Index: third_party/WebKit/Source/bindings/core/v8/ScriptController.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/ScriptController.h b/third_party/WebKit/Source/bindings/core/v8/ScriptController.h
index 94203c30a5040019de9bbd7657eed598696dd2ce..680b59bee3be2ca742845d4bbf81da458a8ba781 100644
--- a/third_party/WebKit/Source/bindings/core/v8/ScriptController.h
+++ b/third_party/WebKit/Source/bindings/core/v8/ScriptController.h
@@ -112,6 +112,10 @@ class CORE_EXPORT ScriptController final
   // Returns true if argument is a JavaScript URL.
   bool ExecuteScriptIfJavaScriptURL(const KURL&, Element*);
 
+  // Creates an isolated world with the specified ID if one doesn't already
+  // exist.
+  void EnsureIsolatedWorld(int world_id);
+
   // Returns true if the current world is isolated, and has its own Content
   // Security Policy. In this case, the policy of the main world should be
   // ignored when evaluating resources injected into the DOM.