extensions: tabs: set tab id to -1 for app/devtools windows

chrome/browser/extensions/api/sessions/sessions_api.cc

 // Copyright 2013 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/extensions/api/sessions/sessions_api.h"
 
 #include <vector>
 
 #include "base/i18n/rtl.h"
 #include "base/lazy_instance.h"
@@ skipping 66 matching lines @@
     const std::string& session_id,
     int index,
     bool pinned,
     int selected_index,
     const Extension* extension) {
   scoped_ptr<tabs::Tab> tab_struct(new tabs::Tab);
 
   const GURL& url = current_navigation.virtual_url();
   std::string title = base::UTF16ToUTF8(current_navigation.title());
 
+  tab_struct->id = -1;
   tab_struct->session_id.reset(new std::string(session_id));
   tab_struct->url.reset(new std::string(url.spec()));
   tab_struct->fav_icon_url.reset(
       new std::string(current_navigation.favicon_url().spec()));
   if (!title.empty()) {
     tab_struct->title.reset(new std::string(title));
   } else {
     const std::string languages =
         profile->GetPrefs()->GetString(prefs::kAcceptLanguages);
     tab_struct->title.reset(
@@ skipping 552 matching lines @@
   return g_factory.Pointer();
 }
 
 void SessionsAPI::OnListenerAdded(const EventListenerInfo& details) {
   sessions_event_router_.reset(
       new SessionsEventRouter(Profile::FromBrowserContext(browser_context_)));
   EventRouter::Get(browser_context_)->UnregisterObserver(this);
 }
 
 }  // namespace extensions