Delete the utility process startup ping.

chrome/browser/safe_browsing/sandboxed_zip_analyzer.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.
 //
 // Browser-side interface to analyze zip files for SafeBrowsing download
 // protection.  The actual zip decoding is performed in a sandboxed utility
 // process.
 //
 // This class lives on the UI thread.
 
@@ skipping 41 matching lines @@
 
   // content::UtilityProcessHostClient implementation.
   // These notifications run on the IO thread.
   void OnProcessCrashed(int exit_code) override;
   void OnProcessLaunchFailed() override;
   bool OnMessageReceived(const IPC::Message& message) override;
 
   // Launches the utility process.  Must run on the IO thread.
   void StartProcessOnIOThread();
 
-  // Notification that the utility process is running, and we can now get its
-  // process handle.
-  void OnUtilityProcessStarted();
-
   // Notification from the utility process that the zip file has been analyzed,
   // with the given results.  Runs on the IO thread.
   void OnAnalyzeZipFileFinished(const zip_analyzer::Results& results);
 
   const base::FilePath zip_file_name_;
   // Once we have opened the file, we store the handle so that we can use it
   // once the utility process has launched.
   base::File zip_file_;
 
   // A temporary file to be used by the utility process for extracting files
   // from the archive.
   base::File temp_file_;
   base::WeakPtr<content::UtilityProcessHost> utility_process_host_;
   const ResultCallback callback_;
   // Initialized on the UI thread, but only accessed on the IO thread.
   bool callback_called_;
 
   DISALLOW_COPY_AND_ASSIGN(SandboxedZipAnalyzer);
 };
 
 }  // namespace safe_browsing
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_SANDBOXED_ZIP_ANALYZER_H_