arc: Add the --arc-available switch

chromeos/chromeos_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.
 
 #ifndef CHROMEOS_CHROMEOS_SWITCHES_H_
 #define CHROMEOS_CHROMEOS_SWITCHES_H_
 
 #include "base/memory/memory_pressure_monitor_chromeos.h"
 #include "chromeos/chromeos_export.h"
 
@@ skipping 10 matching lines @@
 // see chromeos::LoginUtil::GetOffTheRecordCommandLine().)
 
 // Please keep alphabetized.
 CHROMEOS_EXPORT extern const char kAggressiveCacheDiscardThreshold[];
 CHROMEOS_EXPORT extern const char kAggressiveTabDiscardThreshold[];
 CHROMEOS_EXPORT extern const char kAggressiveThreshold[];
 CHROMEOS_EXPORT extern const char kAllowDataRoamingByDefault[];
 CHROMEOS_EXPORT extern const char kAllowFailedPolicyFetchForTest[];
 CHROMEOS_EXPORT extern const char kAllowRAInDevMode[];
 CHROMEOS_EXPORT extern const char kAppOemManifestFile[];
+CHROMEOS_EXPORT extern const char kArcAvailable[];
 CHROMEOS_EXPORT extern const char kArtifactsDir[];
 CHROMEOS_EXPORT extern const char kAshWebUIInit[];
 CHROMEOS_EXPORT extern const char kChildWallpaperLarge[];
 CHROMEOS_EXPORT extern const char kChildWallpaperSmall[];
 CHROMEOS_EXPORT extern const char kConservativeThreshold[];
 CHROMEOS_EXPORT extern const char kCrosRegion[];
 CHROMEOS_EXPORT extern const char kCrosRegionsMode[];
 CHROMEOS_EXPORT extern const char kCrosRegionsModeHide[];
 CHROMEOS_EXPORT extern const char kCrosRegionsModeOverride[];
 CHROMEOS_EXPORT extern const char kDataSaverPromptDemoMode[];
@@ skipping 96 matching lines @@
 GetMemoryPressureThresholds();
 
 // Returns true if flags are set indicating that stored user keys are being
 // converted to GAIA IDs.
 CHROMEOS_EXPORT bool IsGaiaIdMigrationStarted();
 
 }  // namespace switches
 }  // namespace chromeos
 
 #endif  // CHROMEOS_CHROMEOS_SWITCHES_H_