mac: Send SIGTERM instead of SIGHUP to restart Dock

chrome/browser/mac/dock.mm

 // 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.
 
 #import "chrome/browser/mac/dock.h"
 
 #include <ApplicationServices/ApplicationServices.h>
 #include <CoreFoundation/CoreFoundation.h>
 #import <Foundation/Foundation.h>
 #include <signal.h>
@@ skipping 105 matching lines @@
       return nil;
     }
 
     NSString* path = [url path];
     [app_paths addObject:path];
   }
 
   return app_paths;
 }
 
-// Restart the Dock process by sending it a SIGHUP.
+// Restart the Dock process by sending it a SIGTERM.
 void Restart() {
   // Doing this via launchd using the proper job label is the safest way to
   // handle the restart. Unlike "killall Dock", looking this up via launchd
   // guarantees that only the right process will be targeted.
   pid_t pid = base::mac::PIDForJob("com.apple.Dock.agent");
   if (pid <= 0) {
     return;
   }
 
-  // Sending a SIGHUP to the Dock seems to be a more reliable way to get the
+  // Sending a SIGTERM to the Dock seems to be a more reliable way to get the
   // replacement Dock process to read the newly written plist than using the
   // equivalent of "launchctl stop" (even if followed by "launchctl start.")
   // Note that this is a potential race in that pid may no longer be valid or
   // may even have been reused.
-  kill(pid, SIGHUP);
+  kill(pid, SIGTERM);
 }
 
 }  // namespace
 
 AddIconStatus AddIcon(NSString* installed_path, NSString* dmg_app_path) {
   // ApplicationServices.framework/Frameworks/HIServices.framework contains an
   // undocumented function, CoreDockAddFileToDock, that is able to add items
   // to the Dock "live" without requiring a Dock restart. Under the hood, it
   // communicates with the Dock via Mach IPC. It is available as of Mac OS X
   // 10.6. AddIcon could call CoreDockAddFileToDock if available, but
@@ skipping 178 matching lines @@
 
   // Rewrite the plist.
   [dock_plist setObject:persistent_apps forKey:kDockPersistentAppsKey];
   [user_defaults setPersistentDomain:dock_plist forName:kDockDomain];
 
   Restart();
   return IconAddSuccess;
 }
 
 }  // namespace dock