Convert //extensions/{common,shell} from scoped_ptr to std::unique_ptr

extensions/common/extension_messages.h

 // Copyright 2014 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.
 
 // IPC messages for extensions.
 // Multiply-included message file, hence no include guard.
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 234 matching lines @@
 typedef std::map<std::string, std::set<std::string> > ExecutingScriptsMap;
 
 struct ExtensionMsg_PermissionSetStruct {
   ExtensionMsg_PermissionSetStruct();
   explicit ExtensionMsg_PermissionSetStruct(
       const extensions::PermissionSet& permissions);
   ExtensionMsg_PermissionSetStruct(
       const ExtensionMsg_PermissionSetStruct& other);
   ~ExtensionMsg_PermissionSetStruct();
 
-  scoped_ptr<const extensions::PermissionSet> ToPermissionSet() const;
+  std::unique_ptr<const extensions::PermissionSet> ToPermissionSet() const;
 
   extensions::APIPermissionSet apis;
   extensions::ManifestPermissionSet manifest_permissions;
   extensions::URLPatternSet explicit_hosts;
   extensions::URLPatternSet scriptable_hosts;
 };
 
 struct ExtensionMsg_Loaded_Params {
   ExtensionMsg_Loaded_Params();
   ~ExtensionMsg_Loaded_Params();
@@ skipping 558 matching lines @@
                     int /* acc_obj_id */,
                     base::string16 /* selector */)
 
 // Result of a query selector request.
 // result_acc_obj_id is the accessibility tree ID of the result element; 0
 // indicates no result.
 IPC_MESSAGE_ROUTED3(ExtensionHostMsg_AutomationQuerySelector_Result,
                     int /* request_id */,
                     ExtensionHostMsg_AutomationQuerySelector_Error /* error */,
                     int /* result_acc_obj_id */)