[iOS] Upstream //ios/net

ios/net/clients/crn_forwarding_network_client.h

Index: ios/net/clients/crn_forwarding_network_client.h
diff --git a/ios/net/clients/crn_forwarding_network_client.h b/ios/net/clients/crn_forwarding_network_client.h
new file mode 100644
index 0000000000000000000000000000000000000000..5daa9e5ae21f9524f63d8cd81f1f050bc13935b5
--- /dev/null
+++ b/ios/net/clients/crn_forwarding_network_client.h
@@ -0,0 +1,21 @@
+// Copyright 2013 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 IOS_NET_CLIENTS_CRN_FORWARDING_NETWORK_CLIENT_H_
+#define IOS_NET_CLIENTS_CRN_FORWARDING_NETWORK_CLIENT_H_
+
+#import <Foundation/Foundation.h>
+
+#include "base/memory/weak_ptr.h"
+#import "ios/net/clients/crn_network_client_protocol.h"
+
+// Basic CRNNetworkClientProtocol that forwards all the calls to the underlying
+// client. Suitable for injecting via RequestTracker.
+@interface CRNForwardingNetworkClient : NSObject<CRNNetworkClientProtocol>
+
+@property(nonatomic, assign) id<CRNNetworkClientProtocol> underlyingClient;
+
+@end
+
+#endif  // IOS_NET_CLIENTS_CRN_FORWARDING_NETWORK_CLIENT_H_