Convert LoadTimeExtension to gin::Wrappable

chrome/renderer/loadtimes_extension_bindings.h

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // The LoadTimesExtension is a v8 extension to access the time it took
 // to load a page.
 
 #ifndef CHROME_RENDERER_LOADTIMES_EXTENSION_BINDINGS_H_
 #define CHROME_RENDERER_LOADTIMES_EXTENSION_BINDINGS_H_
 
-namespace v8 {
-class Extension;
+#include "content/public/renderer/render_frame_observer.h"
+#include "gin/wrappable.h"
+#include "v8/include/v8.h"
+
+namespace blink {
+class WebFrame;
 }
 
 namespace extensions_v8 {
 
-class LoadTimesExtension {
+class LoadTimesExtensionHelper : public content::RenderFrameObserver {
  public:
-  static v8::Extension* Get();
+  explicit LoadTimesExtensionHelper(content::RenderFrame* render_frame);
+
+  // RenderFrameObserver:
+  void DidFinishLoad() override;
+};
+
+class LoadTimesExtension : public gin::Wrappable<LoadTimesExtension> {
+ public:
+  static gin::WrapperInfo kWrapperInfo;
+
+  static void Install(blink::WebFrame* frame);
+
+ private:
+  // gin::Wrappable:
+  gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
+      v8::Isolate* isolate) override;
+
+  // Returns an object containing the following members:
+  // requestTime:            The time the request to load the page was received.
+  // loadTime:               The time the renderer started the load process.
+  // finishDocumentLoadTime: The time the document itself was loaded
+  //                         (this is before the onload() method is fired).
+  // finishLoadTime:         The time all loading is done, after the onload()
+  //                         method and all resources.
+  // navigationType:         A string describing what user action initiated the
+  //                         load.
+  v8::Local<v8::Object> LoadTimes();
+
+  // Returns an object containing the following members:
+  // startE:    The time the request to load the page was received.
+  // onloadT:   The time the page finished loading.
+  // pageT:     Elapsed time to load the page.
+  // tran:      Page navigation type.
+  v8::Local<v8::Object> CSI();
 };
 
 }  // namespace extensions_v8
 
 #endif  // CHROME_RENDERER_LOADTIMES_EXTENSION_BINDINGS_H_