Use OnceCallback on Mojo interfaces in //content

content/public/test/test_service.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 CONTENT_PUBLIC_TEST_TEST_SERVICE_H_
 #define CONTENT_PUBLIC_TEST_TEST_SERVICE_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 16 matching lines @@
  private:
   // service_manager::Service:
   void OnBindInterface(const service_manager::BindSourceInfo& source_info,
                        const std::string& interface_name,
                        mojo::ScopedMessagePipeHandle interface_pipe) override;
 
   void Create(const service_manager::BindSourceInfo& source_info,
               mojom::TestServiceRequest request);
 
   // TestService:
-  void DoSomething(const DoSomethingCallback& callback) override;
-  void DoTerminateProcess(const DoTerminateProcessCallback& callback) override;
-  void CreateFolder(const CreateFolderCallback& callback) override;
-  void GetRequestorName(const GetRequestorNameCallback& callback) override;
+  void DoSomething(DoSomethingCallback callback) override;
+  void DoTerminateProcess(DoTerminateProcessCallback callback) override;
+  void CreateFolder(CreateFolderCallback callback) override;
+  void GetRequestorName(GetRequestorNameCallback callback) override;
   void CreateSharedBuffer(const std::string& message,
-                          const CreateSharedBufferCallback& callback) override;
+                          CreateSharedBufferCallback callback) override;
 
   service_manager::BinderRegistry registry_;
   mojo::Binding<mojom::TestService> service_binding_;
 
   // The name of the app connecting to us.
   std::string requestor_name_;
 
   DISALLOW_COPY_AND_ASSIGN(TestService);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_TEST_SERVICE_H_