Delete the utility process startup ping.

chrome/common/chrome_utility_messages.h

Index: chrome/common/chrome_utility_messages.h
diff --git a/chrome/common/chrome_utility_messages.h b/chrome/common/chrome_utility_messages.h
index ceac60351ab063ffebdd7e21525a0e4786f0572b..0cd82dec4e61134d813bce009b561f59c9376ae0 100644
--- a/chrome/common/chrome_utility_messages.h
+++ b/chrome/common/chrome_utility_messages.h
@@ -164,11 +164,6 @@ IPC_MESSAGE_CONTROL3(ChromeUtilityMsg_CreateZipFile,
                      base::FileDescriptor /* dest_fd */)
 #endif  // defined(OS_CHROMEOS)
 
-// Requests the utility process to respond with a
-// ChromeUtilityHostMsg_ProcessStarted message once it has started.  This may
-// be used if the host process needs a handle to the running utility process.
-IPC_MESSAGE_CONTROL0(ChromeUtilityMsg_StartupPing)

[Lei Zhang, 2016/04/13 04:39:36]

And you need an IPC reviewer.

-
 #if defined(FULL_SAFE_BROWSING)
 // Tells the utility process to analyze a zip file for malicious download
 // protection, providing a file that can be used temporarily to analyze binaries
@@ -233,9 +228,6 @@ IPC_MESSAGE_CONTROL0(ChromeUtilityHostMsg_CreateZipFile_Succeeded)
 IPC_MESSAGE_CONTROL0(ChromeUtilityHostMsg_CreateZipFile_Failed)
 #endif  // defined(OS_CHROMEOS)
 
-// Reply when the utility process has started.
-IPC_MESSAGE_CONTROL0(ChromeUtilityHostMsg_ProcessStarted)
-
 #if defined(FULL_SAFE_BROWSING)
 // Reply when a zip file has been analyzed for malicious download protection.
 IPC_MESSAGE_CONTROL1(