Add chrome://flags for update menu item

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 298 matching lines @@
 extern const char kEnableContextualSearch[];
 extern const char kEnableDomDistillerButtonAnimation[];
 extern const char kEnableHostedMode[];
 extern const char kEnableHungRendererInfoBar[];
 extern const char kEnablePhysicalWeb[];
 extern const char kProgressBarAnimation[];
 extern const char kEnableThemeColorInTabbedMode[];
 extern const char kDisableAutoHidingToolbarThreshold[];
 extern const char kEnableTabSwitcherInDocumentMode[];
 extern const char kNtpSwitchToExistingTab[];
+extern const char kForceShowUpdateMenuItem[];
+extern const char kForceShowUpdateMenuItemSummary[];
+extern const char kForceShowUpdateMenuItemCustomSummary[];
+extern const char kForceShowUpdateMenuBadge[];
+extern const char kMarketUrlForTesting[];
 #endif  // defined(OS_ANDROID)
 
 #if defined(USE_ASH)
 extern const char kOpenAsh[];
 #endif
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_CHROMEOS)
 extern const char kHelp[];
 extern const char kHelpShort[];
 extern const char kPasswordStore[];
@@ skipping 87 matching lines @@
 #if defined(ENABLE_TASK_MANAGER)
 bool NewTaskManagerEnabled();
 #endif  // defined(ENABLE_TASK_MANAGER)
 
 // 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_