Enable Chrome Signin from Webstore

chrome/renderer/one_click_signin_agent.h

+// Copyright (c) 2013 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.
+
+#ifndef CHROME_RENDERER_ONE_CLICK_SIGNIN_AGENT_H_
+#define CHROME_RENDERER_ONE_CLICK_SIGNIN_AGENT_H_
+
+#include "content/public/renderer/render_view_observer.h"
+
+namespace WebKit {
+class WebFormElement;
+class WebFrame;

[jam, 2013/02/01 02:45:59]

nit: don't need these forward declares since they're in overridden methods, so
they must be in the parent class' header

+}
+
+// OneClickSigninAgent deals with oneclick signin related communications between
+// the renderer and the browser.  There is one OneClickSigninAgent per
+// RenderView.
+class OneClickSigninAgent : public content::RenderViewObserver {
+ public:
+  explicit OneClickSigninAgent(content::RenderView* render_view);
+  virtual ~OneClickSigninAgent();
+
+ private:
+  virtual void WillSubmitForm(WebKit::WebFrame* frame,
+                              const WebKit::WebFormElement& form) OVERRIDE;
+
+  DISALLOW_COPY_AND_ASSIGN(OneClickSigninAgent);
+};
+
+#endif  // CHROME_RENDERER_ONE_CLICK_SIGNIN_AGENT_H_