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

chrome/browser/ui/find_bar/find_bar_controller.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_bar_controller.h"
 
 #include <algorithm>
 
 #include "base/i18n/rtl.h"
 #include "base/logging.h"
@@ skipping 102 matching lines @@
   MaybeSetPrepopulateText();
 
   if (find_tab_helper && find_tab_helper->find_ui_active()) {
     // A tab with a visible find bar just got selected and we need to show the
     // find bar but without animation since it was already animated into its
     // visible state. We also want to reset the window location so that
     // we don't surprise the user by popping up to the left for no apparent
     // reason.
     find_bar_->Show(false);
   }
-
+  // Clearing the count and previous results.
+  find_tab_helper->StopFinding(kClearSelectionOnPage);

[Finnur, 2014/08/25 10:50:41]

This fix isn't correct. This breaks the following use-case:

1. Search in tab A.
2. Switch to tab B.
3. Switch to tab A.
4. Find count and highlighting should still be visible in tab A. 

[Deepak, 2014/08/25 14:22:42]

Thanks for review, I will modify my patch, considering this.

   UpdateFindBarForCurrentResult();
   find_bar_->UpdateFindBarForChangedWebContents();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // FindBarHost, content::NotificationObserver implementation:
 
 void FindBarController::Observe(int type,
                                 const content::NotificationSource& source,
                                 const content::NotificationDetails& details) {
@@ skipping 126 matching lines @@
   }
 
   // Update the find bar with existing results and search text, regardless of
   // whether or not the find bar is visible, so that if it's subsequently
   // shown it is showing the right state for this tab. We update the find text
   // _first_ since the FindBarView checks its emptiness to see if it should
   // clear the result count display when there's nothing in the box.
   find_bar_->SetFindTextAndSelectedRange(find_string,
                                          find_tab_helper->selected_range());
 }