Revert brett's code, for real this time.

chrome/common/url_constants.cc

 // Copyright (c) 2006-2008 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/url_constants.h"
 
 namespace chrome {
 
 const char kAboutScheme[] = "about";
 const char kChromeInternalScheme[] = "chrome-internal";
 const char kChromeUIScheme[] = "chrome-ui";
 const char kDataScheme[] = "data";
 const char kExtensionScheme[] = "chrome-extension";
 const char kFileScheme[] = "file";
 const char kFtpScheme[] = "ftp";
 const char kHttpScheme[] = "http";
 const char kHttpsScheme[] = "https";
 const char kJavaScriptScheme[] = "javascript";
 const char kMailToScheme[] = "mailto";
 const char kUserScriptScheme[] = "chrome-user-script";
 const char kViewSourceScheme[] = "view-source";
 
 const char kStandardSchemeSeparator[] = "://";
 
 const char kAboutBlankURL[] = "about:blank";
-const char kAboutCacheURL[] = "about:cache";
-const char kAboutCrashURL[] = "about:crash";
-const char kAboutHangURL[] = "about:hang";
-const char kAboutMemoryURL[] = "about:memory";
-const char kAboutShortHangURL[] = "about:shorthang";
 
 }  // namespace chrome