Delete the utility process startup ping.

chrome/browser/media_galleries/fileapi/safe_audio_video_checker.h

 // 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.
 
 #ifndef CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_SAFE_AUDIO_VIDEO_CHECKER_H_
 #define CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_SAFE_AUDIO_VIDEO_CHECKER_H_
 
 #include "base/callback_forward.h"
 #include "base/files/file.h"
 #include "base/macros.h"
@@ skipping 16 matching lines @@
   SafeAudioVideoChecker(
       base::File file,
       const storage::CopyOrMoveFileValidator::ResultCallback& callback);
 
   // Must be called on the IO thread.
   void Start();
 
  private:
   enum State {
     INITIAL_STATE,
-    PINGED_STATE,
     STARTED_STATE,
     FINISHED_STATE
   };
 
   ~SafeAudioVideoChecker() override;
 
-  // Starts validation once the utility process has been started.
-  virtual void OnProcessStarted();
-
   // Notification of the result from the utility process.
   void OnCheckingFinished(bool valid);
 
   // UtilityProcessHostClient implementation.
   void OnProcessCrashed(int exit_code) override;
   bool OnMessageReceived(const IPC::Message& message) override;
 
   State state_;
 
   base::File file_;
 
   const storage::CopyOrMoveFileValidator::ResultCallback callback_;
 
   base::WeakPtr<content::UtilityProcessHost> utility_process_host_;
 
   DISALLOW_COPY_AND_ASSIGN(SafeAudioVideoChecker);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_SAFE_AUDIO_VIDEO_CHECKER_H_