Clean up CF To NS Casts and make them slightly safer

chrome/app/chrome_main.cc

 // Copyright (c) 2011 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.
 
 #include "chrome/app/chrome_main.h"
 
 #include "app/app_paths.h"
 #include "app/app_switches.h"
 #include "base/at_exit.h"
 #include "base/command_line.h"
@@ skipping 250 matching lines @@
     name_id = IDS_RENDERER_APP_NAME;
   } else if (process_type == switches::kPluginProcess) {
     name_id = IDS_PLUGIN_APP_NAME;
   } else if (process_type == switches::kExtensionProcess) {
     name_id = IDS_WORKER_APP_NAME;
   } else if (process_type == switches::kUtilityProcess) {
     name_id = IDS_UTILITY_APP_NAME;
   }
   if (name_id) {
     NSString* app_name = l10n_util::GetNSString(name_id);
-    base::mac::SetProcessName(reinterpret_cast<CFStringRef>(app_name));
+    base::mac::SetProcessName(base::mac::NSToCFCast(app_name));
   }
 }
 
 // Completes the Mach IPC handshake by sending this process' task port to the
 // parent process.  The parent is listening on the Mach port given by
 // |GetMachPortName()|.  The task port is used by the parent to get CPU/memory
 // stats to display in the task manager.
 void SendTaskPortToParentProcess() {
   const mach_msg_timeout_t kTimeoutMs = 100;
   const int32_t kMessageId = 0;
@@ skipping 484 matching lines @@
 
   if (SubprocessNeedsResourceBundle(process_type))
     ResourceBundle::CleanupSharedInstance();
 
   logging::CleanupChromeLogging();
 
   chrome_main::LowLevelShutdown();
 
   return exit_code;
 }