Add an option in language settings for activating the IME menu.

chromeos/chromeos_switches.h

Index: chromeos/chromeos_switches.h
diff --git a/chromeos/chromeos_switches.h b/chromeos/chromeos_switches.h
index 957b5a6bf358d42834393f65b4269a9744825682..9723ae306b8016d47f5c56e209546fb56e340250 100644
--- a/chromeos/chromeos_switches.h
+++ b/chromeos/chromeos_switches.h
@@ -59,6 +59,7 @@ CHROMEOS_EXPORT extern const char kEnableArc[];
 CHROMEOS_EXPORT extern const char kEnableConsumerManagement[];
 CHROMEOS_EXPORT extern const char kEnableExtensionAssetsSharing[];
 CHROMEOS_EXPORT extern const char kEnableFirstRunUITransitions[];
+CHROMEOS_EXPORT extern const char kEnableImeMenu[];
 CHROMEOS_EXPORT extern const char kEnableKioskMode[];
 CHROMEOS_EXPORT extern const char kEnableNetworkPortalNotification[];
 CHROMEOS_EXPORT extern const char kDisableNewKoreanIme[];
@@ -118,6 +119,8 @@ CHROMEOS_EXPORT bool MemoryPressureHandlingEnabled();
 CHROMEOS_EXPORT base::chromeos::MemoryPressureMonitor::MemoryPressureThresholds
 GetMemoryPressureThresholds();
 
+CHROMEOS_EXPORT bool IsImeMenuEnabled();
+
 }  // namespace switches
 }  // namespace chromeos