Replace deprecated base::NonThreadSafe in content/browser in favor of SequenceChecker.

content/browser/child_process_launcher.h

 // 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.
 
 #ifndef CONTENT_BROWSER_CHILD_PROCESS_LAUNCHER_H_
 #define CONTENT_BROWSER_CHILD_PROCESS_LAUNCHER_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/shared_memory.h"
 #include "base/memory/weak_ptr.h"
 #include "base/process/kill.h"
 #include "base/process/process.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "build/build_config.h"
 #include "content/browser/child_process_launcher_helper.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/common/result_codes.h"
 #include "mojo/edk/embedder/outgoing_broker_client_invitation.h"
 #include "mojo/edk/embedder/scoped_platform_handle.h"
 
 namespace base {
 class CommandLine;
@@ skipping 18 matching lines @@
 
 #if defined(OS_WIN)
 static_assert(static_cast<int>(LAUNCH_RESULT_START) >
                   static_cast<int>(sandbox::SBOX_ERROR_LAST),
               "LaunchResultCode must not overlap with sandbox::ResultCode");
 #endif
 
 // Launches a process asynchronously and notifies the client of the process
 // handle when it's available.  It's used to avoid blocking the calling thread
 // on the OS since often it can take > 100 ms to create the process.
-class CONTENT_EXPORT ChildProcessLauncher : public base::NonThreadSafe {
+class CONTENT_EXPORT ChildProcessLauncher {
  public:
   class CONTENT_EXPORT Client {
    public:
     // Will be called on the thread that the ChildProcessLauncher was
     // constructed on.
     virtual void OnProcessLaunched() = 0;
 
     virtual void OnProcessLaunchFailed(int error_code) {};
 
    protected:
@@ skipping 99 matching lines @@
   std::unique_ptr<mojo::edk::OutgoingBrokerClientInvitation>
       broker_client_invitation_;
   const mojo::edk::ProcessErrorCallback process_error_callback_;
 
   // Controls whether the child process should be terminated on browser
   // shutdown. Default behavior is to terminate the child.
   const bool terminate_child_on_shutdown_;
 
   scoped_refptr<internal::ChildProcessLauncherHelper> helper_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   base::WeakPtrFactory<ChildProcessLauncher> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChildProcessLauncher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_CHILD_PROCESS_LAUNCHER_H_