First cut at custom user style sheets.

chrome/common/chrome_switches.cc

 // Copyright (c) 2010 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 283 matching lines @@
 // Enable syncing browser preferences.
 const char kEnableSyncPreferences[]         = "enable-sync-preferences";
 
 // Enable the tabbed bookmark manager
 const char kEnableTabbedBookmarkManager[]   = "enable-tabbed-bookmark-manager";
 
 // Whether the multiple profiles feature based on the user-data-dir flag is
 // enabled or not.
 const char kEnableUserDataDirProfiles[]     = "enable-udd-profiles";
 
+// Enable user style sheet (read from User Style Sheet in the profile dir).
+const char kEnableUserStyleSheet[]          = "enable-user-stylesheet";
+
 // Enables the option to show tabs as a vertical stack down the side of the
 // browser window.
 const char kEnableVerticalTabs[]            = "enable-vertical-tabs";
 
 // Enables video layering where video is rendered as a separate layer outside
 // of the backing store.
 const char kEnableVideoLayering[]           = "enable-video-layering";
 
 // Spawn threads to watch for excessive delays in specified message loops.
 // User should set breakpoints on Alarm() to examine problematic thread.
@@ skipping 518 matching lines @@
 
 // -----------------------------------------------------------------------------
 // DO NOT ADD YOUR CRAP TO THE BOTTOM OF THIS FILE.
 //
 // You were going to just dump your switches here, weren't you? Instead,
 // please put them in alphabetical order above, or in order inside the
 // appropriate ifdef at the bottom. The order should match the header.
 // -----------------------------------------------------------------------------
 
 }  // namespace switches