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

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

Index: third_party/WebKit/Source/bindings/core/v8/ScriptController.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/ScriptController.cpp b/third_party/WebKit/Source/bindings/core/v8/ScriptController.cpp
index 7a2345af3bee52599e92125f0d85869c58be4c19..6e71d68b0f8e8ef762c73b292fb91d7af35968a7 100644
--- a/third_party/WebKit/Source/bindings/core/v8/ScriptController.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/ScriptController.cpp
@@ -360,4 +360,21 @@ void ScriptController::ExecuteScriptInIsolatedWorld(
   }
 }
 
+int ScriptController::CreateNewDevToolsIsolatedWorld(const String& world_name) {
+  int world_id = DOMWrapperWorld::GenerateWorldIdForType(
+      DOMWrapperWorld::WorldType::kIsolated);
+  // Bail out if we could not allocate an id.
+  if (world_id == DOMWrapperWorld::kInvalidWorldId)
+    return DOMWrapperWorld::kInvalidWorldId;
+
+  RefPtr<DOMWrapperWorld> world =
+      DOMWrapperWorld::EnsureIsolatedWorld(GetIsolate(), world_id);
+
+  if (!world_name.IsEmpty())
+    DOMWrapperWorld::SetIsolatedWorldHumanReadableName(world_id, world_name);
+  // Make sure the execution context exists.
+  WindowProxy(*world);
+  return world_id;
+}
+
 }  // namespace blink