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 e43f9c7389194a7b613c350553ddde8e307738b5..c60904ee16a5843ceb5c50fa0ede958b43ba58d3 100644
--- a/third_party/WebKit/Source/core/inspector/InspectorPageAgent.cpp
+++ b/third_party/WebKit/Source/core/inspector/InspectorPageAgent.cpp
@@ -909,6 +909,29 @@ 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().CreateNewDevToolsIsolatedWorld(world_name);
+  if (world_id == DOMWrapperWorld::kInvalidWorldId)
+    return Response::Error("Could not create isolated world");
+
+  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_);