Convert make_names and make_event_factory to use json5 config format.

third_party/WebKit/Source/core/events/EventTargetFactory.json5

+{
+  metadata: {
+    namespace: "EventTarget",
+    export: "CORE_EXPORT",
+  },
+
+  data: [
+    "core/animation/AnimationPlayer",
+    "core/css/FontFaceSet",
+    "core/css/MediaQueryList",
+    "core/dom/BroadcastChannel",
+    "core/dom/MessagePort",
+    "core/dom/Node",
+    "core/fileapi/FileReader",
+    "core/html/ime/InputMethodContext",
+    "core/html/track/AudioTrackList",
+    "core/html/track/TextTrack",
+    "core/html/track/TextTrackCue",
+    "core/html/track/TextTrackList",
+    "core/html/track/VideoTrackList",
+    "core/loader/appcache/ApplicationCache",
+    "core/offscreencanvas/OffscreenCanvas",
+    "core/page/EventSource",
+    "core/timing/Performance",
+    {
+      name: "core/frame/VisualViewport",
+      ImplementedAs: "DOMVisualViewport",
+    },
+    {
+      name: "core/frame/Window",
+      ImplementedAs: "DOMWindow",
+    },
+    "core/workers/DedicatedWorkerGlobalScope",
+    "core/workers/SharedWorker",
+    "core/workers/SharedWorkerGlobalScope",
+    "core/workers/Worker",
+    "core/xml/XMLHttpRequest",
+    "core/xml/XMLHttpRequestUpload",
+  ],
+}