Share TabFirstRenderWatcher with HtmlDialogView.

chrome/browser/chromeos/tab_first_render_watcher.h

-// Copyright (c) 2011 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_BROWSER_CHROMEOS_TAB_FIRST_RENDER_WATCHER_H_
-#define CHROME_BROWSER_CHROMEOS_TAB_FIRST_RENDER_WATCHER_H_
-#pragma once
-
-#include "base/compiler_specific.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
-
-class RenderViewHost;
-class TabContents;
-
-namespace chromeos {
-
-// This class watches given TabContent's loading and rendering state change.
-// TODO(xiyuan): Move this to a proper place and share with HTMLDialogView.
-class TabFirstRenderWatcher : public content::NotificationObserver {
- public:
-  class Delegate {
-   public:
-    virtual void OnRenderHostCreated(RenderViewHost* host) = 0;
-    virtual void OnTabMainFrameLoaded() = 0;
-    virtual void OnTabMainFrameFirstRender() = 0;
-  };
-
-  TabFirstRenderWatcher(TabContents* tab, Delegate* delegate);
-
- private:
-  // Overridden from content::NotificationObserver
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) OVERRIDE;
-
-  enum State {
-    NONE,
-    LOADED,        // Renderer loaded the page.
-    FIRST_PAINT,   // 1st paint event after the page is loaded.
-  };
-  State state_;
-
-  // TabContents that this class watches.
-  TabContents* tab_contents_;
-
-  // Delegate to notify.
-  Delegate* delegate_;
-
-  content::NotificationRegistrar registrar_;
-
-  DISALLOW_COPY_AND_ASSIGN(TabFirstRenderWatcher);
-};
-
-}   // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_TAB_FIRST_RENDER_WATCHER_H_