Findbox should disappear once we reload and open new tab and come back to previous tab.

chrome/browser/ui/find_bar/find_tab_helper.cc

 // 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.
 
 #include "chrome/browser/ui/find_bar/find_tab_helper.h"
 
 #include <vector>
 
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 13 matching lines @@
 
 // static
 int FindTabHelper::find_request_id_counter_ = -1;
 
 FindTabHelper::FindTabHelper(WebContents* web_contents)
     : content::WebContentsObserver(web_contents),
       find_ui_active_(false),
       find_op_aborted_(false),
       current_find_request_id_(find_request_id_counter_++),
       last_search_case_sensitive_(false),
-      last_search_result_() {
+      last_search_result_(),
+      loading_at_tab_Change_(false) {
 }
 
 FindTabHelper::~FindTabHelper() {
 }
 
 void FindTabHelper::StartFinding(base::string16 search_string,
                                  bool forward_direction,
                                  bool case_sensitive) {
   // Remove the carriage return character, which generally isn't in web content.
   const base::char16 kInvalidChars[] = { '\r', 0 };
@@ skipping 124 matching lines @@
     // found.
     last_search_result_ = FindNotificationDetails(
         request_id, number_of_matches, selection, active_match_ordinal,
         final_update);
     content::NotificationService::current()->Notify(
         chrome::NOTIFICATION_FIND_RESULT_AVAILABLE,
         content::Source<WebContents>(web_contents()),
         content::Details<FindNotificationDetails>(&last_search_result_));
   }
 }