Replace "nested message loop" with "nested run loop" in comments.

chrome/browser/browser_process_impl.cc

 // 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.
 
 #include "chrome/browser/browser_process_impl.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <map>
@@ skipping 1326 matching lines @@
   }
 }
 
 void BrowserProcessImpl::Unpin() {
   DCHECK(CalledOnValidThread());
   release_last_reference_callstack_ = base::debug::StackTrace();
 
   shutting_down_ = true;
 #if BUILDFLAG(ENABLE_PRINTING)
   // Wait for the pending print jobs to finish. Don't do this later, since
-  // this might cause a nested message loop to run, and we don't want pending
+  // this might cause a nested run loop to run, and we don't want pending
   // tasks to run once teardown has started.
   print_job_manager_->Shutdown();
 #endif
 
 #if defined(LEAK_SANITIZER)
   // Check for memory leaks now, before we start shutting down threads. Doing
   // this early means we won't report any shutdown-only leaks (as they have
   // not yet happened at this point).
   // If leaks are found, this will make the process exit immediately.
   __lsan_do_leak_check();
@@ skipping 69 matching lines @@
 }
 
 void BrowserProcessImpl::OnAutoupdateTimer() {
   if (CanAutorestartForUpdate()) {
     DLOG(WARNING) << "Detected update.  Restarting browser.";
     RestartBackgroundInstance();
   }
 }
 
 #endif  // (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)