Site specific secondary tiles for Windows 8.

chrome/browser/ui/metro_pin_tab_helper.h

-// Copyright (c) 2012 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_UI_METRO_PIN_TAB_HELPER_H_
-#define CHROME_BROWSER_UI_METRO_PIN_TAB_HELPER_H_
-
-#include "content/public/browser/web_contents_observer.h"
-#include "content/public/browser/web_contents_user_data.h"
-
-// Per-tab class to help manage metro pinning.
-class MetroPinTabHelper
-    : public content::WebContentsObserver,
-      public content::WebContentsUserData<MetroPinTabHelper> {
- public:
-  virtual ~MetroPinTabHelper();
-
-  bool is_pinned() const { return is_pinned_; }
-
-  void TogglePinnedToStartScreen();
-
-  // content::WebContentsObserver overrides:
-  virtual void DidNavigateMainFrame(
-      const content::LoadCommittedDetails& details,
-      const content::FrameNavigateParams& params) OVERRIDE;
-
- private:
-  explicit MetroPinTabHelper(content::WebContents* tab_contents);
-  friend class content::WebContentsUserData<MetroPinTabHelper>;
-
-  // Queries the metro driver about the pinned state of the current URL.
-  void UpdatePinnedStateForCurrentURL();
-
-  // Whether the current URL is pinned to the metro start screen.
-  bool is_pinned_;
-
-  DISALLOW_COPY_AND_ASSIGN(MetroPinTabHelper);
-};
-
-#endif  // CHROME_BROWSER_UI_METRO_PIN_TAB_HELPER_H_