Add a switch for changing the fd limit on Mac/Linux....

chrome/common/chrome_switches.cc

 // Copyright (c) 2006-2009 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/common/chrome_switches.h"
 
 #include "base/base_switches.h"
 
 namespace switches {
 
@@ skipping 486 matching lines @@
 const wchar_t kZygoteCmdPrefix[] = L"zygote-cmd-prefix";
 
 // Enables using ThumbnailStore instead of ThumbnailDatabase for setting and
 // getting thumbnails for the new tab page.
 const wchar_t kThumbnailStore[]                = L"thumbnail-store";
 
 // Experimental. Shows a dialog asking the user to try chrome. This flag
 // is to be used only by the upgrade process.
 const wchar_t kTryChromeAgain[]      = L"try-chrome-again";
 
+// The file descriptor limit is set to the value of this switch, subject to the
+// OS hard limits. Useful for testing that file descriptor exhaustion is handled
+// gracefully.
+const wchar_t kFileDescriptorLimit[]           = L"file-descriptor-limit";
+
 }  // namespace switches