CrOS: Add a flag to allow easy selection of tablet mode.

chrome/common/chrome_switches.h

 // Copyright (c) 2012 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.
 
 // Defines the shared command-line switches used by code in the Chrome
 // directory that don't have anywhere more specific to go.
 
 #ifndef CHROME_COMMON_CHROME_SWITCHES_H_
 #define CHROME_COMMON_CHROME_SWITCHES_H_
 
@@ skipping 135 matching lines @@
 extern const char kExtensionContentVerificationEnforceStrict[];
 extern const char kExtensionsInstallVerification[];
 extern const char kExtensionsNotWebstore[];
 extern const char kExtensionsUpdateFrequency[];
 extern const char kFastStart[];
 extern const char kForceAndroidAppMode[];
 extern const char kForceAppMode[];
 extern const char kForceDesktopIOSPromotion[];
 extern const char kForceFirstRun[];
 extern const char kForceLocalNtp[];
+extern const char kForceTabletMode[];
+extern const char kForceTabletModeAuto[];
+extern const char kForceTabletModeClamshell[];
+extern const char kForceTabletModeTouchView[];
 extern const char kForceVariationIds[];
 extern const char kHistoryEnableGroupByDomain[];
 extern const char kHomePage[];
 extern const char kHostResolverRetryAttempts[];
 extern const char kHostRules[];
 extern const char kIgnoreUrlFetcherCertRequests[];
 extern const char kIncognito[];
 extern const char kInstallChromeApp[];
 extern const char kInstallSupervisedUserWhitelists[];
 extern const char kInstantProcess[];
@@ skipping 201 matching lines @@
 #if defined(OS_WIN)
 bool GDITextPrintingEnabled();
 #endif
 
 // DON'T ADD RANDOM STUFF HERE. Put it in the main section above in
 // alphabetical order, or in one of the ifdefs (also in order in each section).
 
 }  // namespace switches
 
 #endif  // CHROME_COMMON_CHROME_SWITCHES_H_