chrome: Add out-of-line copy ctors for complex classes.

chrome/browser/extensions/api/automation_internal/automation_event_router.h

 // Copyright 2015 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_AUTOMATION_INTERNAL_AUTOMATION_EVENT_ROUTER_H_
 #define CHROME_BROWSER_EXTENSIONS_API_AUTOMATION_INTERNAL_AUTOMATION_EVENT_ROUTER_H_
 
 #include <vector>
 
 #include "base/macros.h"
@@ skipping 41 matching lines @@
 
   // Notify all automation extensions that an accessibility tree was
   // destroyed. If |browser_context| is null,
   void DispatchTreeDestroyedEvent(
       int tree_id,
       content::BrowserContext* browser_context);
 
  private:
   struct AutomationListener {
     AutomationListener();
+    AutomationListener(const AutomationListener& other);
     ~AutomationListener();
 
     ExtensionId extension_id;
     int routing_id;
     int process_id;
     bool desktop;
     std::set<int> tree_ids;
     bool is_active_profile;
   };
 
@@ skipping 30 matching lines @@
   Profile* active_profile_;
 
   friend struct base::DefaultSingletonTraits<AutomationEventRouter>;
 
   DISALLOW_COPY_AND_ASSIGN(AutomationEventRouter);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_AUTOMATION_INTERNAL_AUTOMATION_EVENT_ROUTER_H_