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..51961dfbe12472a4a9851940227f546c66b804d4 100644
--- a/third_party/WebKit/Source/core/inspector/InspectorPageAgent.cpp
+++ b/third_party/WebKit/Source/core/inspector/InspectorPageAgent.cpp
@@ -901,6 +901,34 @@ Response InspectorPageAgent::getLayoutMetrics(
   return Response::OK();
 }
 
+protocol::Response InspectorPageAgent::ensureIsolatedWorld(
+    const String& frame_id,
+    int world_id,
+    Maybe<String> security_origin,
+    Maybe<String> content_security_policy) {
+  LocalFrame* frame =
+      IdentifiersFactory::FrameById(inspected_frames_, frame_id);
+  if (!frame)
+    return Response::Error("No frame for given id found");
+
+  if (world_id <= DOMWrapperWorld::kMainWorldId ||
+      world_id >= DOMWrapperWorld::kEmbedderWorldIdLimit) {
+    return Response::Error("Invalid worldId");
+  }
+
+  frame->GetScriptController().EnsureIsolatedWorld(world_id);
+  if (security_origin.isJust()) {
+    DOMWrapperWorld::SetIsolatedWorldSecurityOrigin(
+        world_id, SecurityOrigin::CreateFromString(security_origin.fromJust()));
+  }
+
+  if (content_security_policy.isJust()) {
+    DOMWrapperWorld::SetIsolatedWorldContentSecurityPolicy(
+        world_id, content_security_policy.fromJust());
+  }
+  return Response::OK();
+}
+
 DEFINE_TRACE(InspectorPageAgent) {
   visitor->Trace(inspected_frames_);
   visitor->Trace(inspector_resource_content_loader_);