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

chrome/browser/media/webrtc/desktop_capture_access_handler.cc

 // Copyright 2015 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/media/webrtc/desktop_capture_access_handler.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 257 matching lines @@
   // probably a new one.
   content::MediaStreamRequestResult result =
       content::MEDIA_DEVICE_INVALID_STATE;
 
   // Approve request only when the following conditions are met:
   //  1. Screen capturing is enabled via command line switch or white-listed for
   //     the given origin.
   //  2. Request comes from a page with a secure origin or from an extension.
   if (screen_capture_enabled && origin_is_secure) {
     // Get title of the calling application prior to showing the message box.
-    // chrome::ShowQuestionMessageBox() starts a nested message loop which may
+    // chrome::ShowQuestionMessageBox() starts a nested run loop which may
     // allow |web_contents| to be destroyed on the UI thread before the messag
     // box is closed. See http://crbug.com/326690.
     base::string16 application_title =
         GetApplicationTitle(web_contents, extension);
 #if !defined(OS_ANDROID)
     gfx::NativeWindow parent_window =
         FindParentWindowForWebContents(web_contents);
 #else
     gfx::NativeWindow parent_window = NULL;
 #endif
@@ skipping 160 matching lines @@
   const bool display_notification = ShouldDisplayNotification(extension);
 
   ui = GetDevicesForDesktopCapture(&devices, media_id, capture_audio,
                                    request.disable_local_echo,
                                    display_notification,
                                    GetApplicationTitle(web_contents, extension),
                                    base::UTF8ToUTF16(original_extension_name));
   UpdateExtensionTrusted(request, extension);
   callback.Run(devices, content::MEDIA_DEVICE_OK, std::move(ui));
 }