Add Android's context menu handler used on the NTP.

chrome/browser/android/tab_android.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_ANDROID_TAB_ANDROID_H_
 #define CHROME_BROWSER_ANDROID_TAB_ANDROID_H_
 
 #include <jni.h>
 
 #include "base/android/jni_helper.h"
 #include "base/android/scoped_java_ref.h"
+#include "base/callback_forward.h"
 #include "base/string16.h"
 
 class GURL;
-class OnContextMenuItemSelectedCallBack;
 class SkBitmap;
 
 namespace browser_sync {
 class SyncedTabDelegate;
 }
 
 namespace content {
 struct ContextMenuParams;
 class WebContents;
 }
@@ skipping 17 matching lines @@
   virtual void OnReceivedHttpAuthRequest(jobject auth_handler,
                                          const string16& host,
                                          const string16& realm) = 0;
 
   // Called to show the regular context menu that is triggered by a long press.
   virtual void ShowContextMenu(const content::ContextMenuParams& params) = 0;
 
   // Called to show a custom context menu. Used by the NTP.
   virtual void ShowCustomContextMenu(
       const content::ContextMenuParams& params,
-      OnContextMenuItemSelectedCallBack* callback) = 0;
+      const base::Callback<void(int)>& callback) = 0;
 
   virtual void ShowSelectFileDialog(
       const base::android::ScopedJavaLocalRef<jobject>& select_file) = 0;
 
   // --------------------------------------------------------------------------
   // Public methods that call to Java via JNI
   // --------------------------------------------------------------------------
   // Called when context menu option to create the bookmark shortcut on
   // homescreen is called.
   virtual void AddShortcutToBookmark(
       const GURL& url, const string16& title, const SkBitmap& skbitmap,
       int r_value, int g_value, int b_value) = 0;
 
  protected:
   virtual ~TabAndroid();
 
   int tab_id_;
 };
 
 #endif  // CHROME_BROWSER_ANDROID_TAB_ANDROID_H_