Adding domain and facade supporting classes for remoting iOS app.

remoting/client/ios/facade/remoting_service.h

Index: remoting/client/ios/facade/remoting_service.h
diff --git a/remoting/client/ios/facade/remoting_service.h b/remoting/client/ios/facade/remoting_service.h
new file mode 100644
index 0000000000000000000000000000000000000000..b07147490ab0e0c6331039a36331eaa4a760396c
--- /dev/null
+++ b/remoting/client/ios/facade/remoting_service.h
@@ -0,0 +1,22 @@
+// Copyright 2017 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 REMOTING_CLIENT_IOS_FACADE_REMOTING_SERCICE_H_
+#define REMOTING_CLIENT_IOS_FACADE_REMOTING_SERCICE_H_
+
+#import "remoting/client/ios/domain/host.h"
+#import "remoting/client/ios/domain/user.h"
+
+@interface RemotingService : NSObject
+
++ (RemotingService*)sharedInstance;
+
+- (BOOL)isAuthenticated;
+- (void)authenticateWithAuthorizationCode:(NSString*)authorizationCode;
+- (User*)getUser;
+- (NSArray<Host*>*)getHosts;
+
+@end
+
+#endif  // REMOTING_CLIENT_IOS_FACADE_REMOTING_SERCICE_H_