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

Index: chrome/browser/ui/find_bar/find_bar_controller.cc
diff --git a/chrome/browser/ui/find_bar/find_bar_controller.cc b/chrome/browser/ui/find_bar/find_bar_controller.cc
index 713c3fa0984cbf5303fb1af640a47d0266e9b60c..9dc04d94128ce25b85edc8a63ca35eb27923ace1 100644
--- a/chrome/browser/ui/find_bar/find_bar_controller.cc
+++ b/chrome/browser/ui/find_bar/find_bar_controller.cc
@@ -112,6 +112,13 @@ void FindBarController::ChangeWebContents(WebContents* contents) {
 
   MaybeSetPrepopulateText();
 
+  // Disappearing Findbox.
+  if (find_tab_helper && find_tab_helper->isloading_at_tabchange()) {
+    find_tab_helper->set_isloading_at_tabchange(false);
+    EndFindSession(kKeepSelectionOnPage, kClearResultsInFindBox);
+    return;
+  }
+
   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