Lands http://codereview.chromium.org/193032 for Charlie:...

chrome/common/pref_names.h

 // 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.
 
 // Constants for the names of various preferences, for easier changing.
 
 #ifndef CHROME_COMMON_PREF_NAMES_H_
 #define CHROME_COMMON_PREF_NAMES_H_
 
 #include "build/build_config.h"
@@ skipping 53 matching lines @@
 extern const wchar_t kAlternateErrorPagesEnabled[];
 extern const wchar_t kDnsPrefetchingEnabled[];
 extern const wchar_t kDnsStartupPrefetchList[];
 extern const wchar_t kDnsHostReferralList[];
 #if defined(OS_LINUX)
 extern const wchar_t kCertRevocationCheckingEnabled[];
 extern const wchar_t kSSL2Enabled[];
 extern const wchar_t kSSL3Enabled[];
 extern const wchar_t kTLS1Enabled[];
 #endif
+#if defined(OS_CHROMEOS)
+extern const wchar_t kTapToClickEnabled[];
+extern const wchar_t kVertEdgeScrollEnabled[];
+#endif
 extern const wchar_t kIpcDisabledMessages[];
 extern const wchar_t kShowHomeButton[];
 extern const wchar_t kShowPageOptionsButtons[];
 extern const wchar_t kRecentlySelectedEncoding[];
 extern const wchar_t kDeleteBrowsingHistory[];
 extern const wchar_t kDeleteDownloadHistory[];
 extern const wchar_t kDeleteCache[];
 extern const wchar_t kDeleteCookies[];
 extern const wchar_t kDeletePasswords[];
 extern const wchar_t kDeleteFormData[];
@@ skipping 134 matching lines @@
 extern const wchar_t kNTPShownSections[];
 
 extern const wchar_t kDevToolsOpenDocked[];
 extern const wchar_t kDevToolsSplitLocation[];
 
 extern const wchar_t kSyncLastSyncedTime[];
 extern const wchar_t kSyncHasSetupCompleted[];
 }
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_