Fix for crash in GuestViewBase::FindReply.

content/browser/web_contents/web_contents_impl.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 "content/browser/web_contents/web_contents_impl.h"
 
 #include <stddef.h>
 
 #include <cmath>
 #include <utility>
@@ skipping 5098 matching lines @@
     find_request_manager_.reset(new FindRequestManager(this));
 
   return find_request_manager_.get();
 }
 
 void WebContentsImpl::NotifyFindReply(int request_id,
                                       int number_of_matches,
                                       const gfx::Rect& selection_rect,
                                       int active_match_ordinal,
                                       bool final_update) {
-  if (delegate_) {
+  if (delegate_ && !is_being_destroyed_) {
     delegate_->FindReply(this, request_id, number_of_matches, selection_rect,
                          active_match_ordinal, final_update);
   }
 }
 
 void WebContentsImpl::IncrementBluetoothConnectedDeviceCount() {
   // Trying to invalidate the tab state while being destroyed could result in a
   // use after free.
   if (IsBeingDestroyed()) {
     return;
@@ skipping 83 matching lines @@
   for (RenderViewHost* render_view_host : render_view_host_set)
     render_view_host->OnWebkitPreferencesChanged();
 }
 
 void WebContentsImpl::SetJavaScriptDialogManagerForTesting(
     JavaScriptDialogManager* dialog_manager) {
   dialog_manager_ = dialog_manager;
 }
 
 }  // namespace content