Add help button to app launcher

chrome/common/url_constants.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.
 
 // Contains constants for known URLs and portions thereof.
 
 #ifndef CHROME_COMMON_URL_CONSTANTS_H_
 #define CHROME_COMMON_URL_CONSTANTS_H_
 
 #include "build/build_config.h"
@@ skipping 357 matching lines @@
 // The URL for the "Learn more" page for interrupted downloads.
 extern const char kDownloadInterruptedLearnMoreURL[];
 
 // The URL for the "Learn more" page on the sync setup dialog, when syncing
 // everything.
 extern const char kSyncEverythingLearnMoreURL[];
 
 // The URL for information on how to recover your password.
 extern const char kInvalidPasswordHelpURL[];
 
+// The URL for information on how to use the app launcher.
+extern const char kAppLauncherHelpURL[];
+
 // The URL for information on what to do if you can't sign in to your Google
 // account.
 extern const char kCanNotAccessAccountURL[];
 
 // The URL for the "Learn more" page on sync encryption.
 extern const char kSyncEncryptionHelpURL[];
 
 // The URL for the "Learn more" link when there is a sync error.
 extern const char kSyncErrorsHelpURL[];
 
@@ skipping 59 matching lines @@
 // Parameters that get appended to force SafeSearch.
 extern const char kSafeSearchSafeParameter[];
 extern const char kSafeSearchSsuiParameter[];
 
 // The URL for the "Learn more" link in the media access infobar.
 extern const char kMediaAccessLearnMoreUrl[];
 
 }  // namespace chrome
 
 #endif  // CHROME_COMMON_URL_CONSTANTS_H_