Add BackupRollbackController for starting backup/rollback

chrome/common/chrome_switches.cc

 // 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.
 
 #include "chrome/common/chrome_switches.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 
 namespace switches {
@@ skipping 1239 matching lines @@
     "sync-deferred-startup-timeout-seconds";
 
 // Enables feature to avoid unnecessary GetUpdate requests.
 const char kSyncEnableGetUpdateAvoidance[]   =
     "sync-enable-get-update-avoidance";
 
 // Enables directory support for sync filesystem
 const char kSyncfsEnableDirectoryOperation[] =
     "enable-syncfs-directory-operation";
 
+// Enables backup/rollback of user's data.
+const char kSyncEnableBackupRollback[] = "enable-sync-backup-rollback";
+
 // Passes the name of the current running automated test to Chrome.
 const char kTestName[]                      = "test-name";
 
 // Disables same-origin check on HTTP resources pushed via a SPDY proxy.
 // The value is the host:port of the trusted proxy.
 const char kTrustedSpdyProxy[]              = "trusted-spdy-proxy";
 
 // Experimental. Shows a dialog asking the user to try chrome. This flag is to
 // be used only by the upgrade process.
 const char kTryChromeAgain[]                = "try-chrome-again";
@@ skipping 204 matching lines @@
 
 // -----------------------------------------------------------------------------
 // DO NOT ADD YOUR CRAP TO THE BOTTOM OF THIS FILE.
 //
 // You were going to just dump your switches here, weren't you? Instead, please
 // put them in alphabetical order above, or in order inside the appropriate
 // ifdef at the bottom. The order should match the header.
 // -----------------------------------------------------------------------------
 
 }  // namespace switches