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

third_party/WebKit/Source/core/inspector/InspectorPageAgent.cpp

Index: third_party/WebKit/Source/core/inspector/InspectorPageAgent.cpp
diff --git a/third_party/WebKit/Source/core/inspector/InspectorPageAgent.cpp b/third_party/WebKit/Source/core/inspector/InspectorPageAgent.cpp
index 2e2a503fdbf466bfff7842f56f5207405c426db9..bc96fc0ed5c92fac9e34167e14c1bb6db5c36feb 100644
--- a/third_party/WebKit/Source/core/inspector/InspectorPageAgent.cpp
+++ b/third_party/WebKit/Source/core/inspector/InspectorPageAgent.cpp
@@ -901,6 +901,26 @@ Response InspectorPageAgent::getLayoutMetrics(
   return Response::OK();
 }
 
+protocol::Response InspectorPageAgent::createIsolatedWorld(
+    const String& frame_id,
+    const String& world_name,
+    Maybe<bool> grant_universal_access) {
+  LocalFrame* frame =
+      IdentifiersFactory::FrameById(inspected_frames_, frame_id);
+  if (!frame)
+    return Response::Error("No frame for given id found");
+
+  int world_id =
+      frame->GetScriptController().CreateNewIsolatedWorld(world_name);
+  if (grant_universal_access.fromMaybe(false)) {
+    RefPtr<SecurityOrigin> security_origin =
+        frame->GetSecurityContext()->GetSecurityOrigin()->IsolatedCopy();
+    security_origin->GrantUniversalAccess();
+    DOMWrapperWorld::SetIsolatedWorldSecurityOrigin(world_id, security_origin);
+  }
+  return Response::OK();
+}
+
 DEFINE_TRACE(InspectorPageAgent) {
   visitor->Trace(inspected_frames_);
   visitor->Trace(inspector_resource_content_loader_);