[Remoting Android] Fix GetWeakPtr() calls on multiple threads

remoting/client/jni/chromoting_jni_instance.h

 // 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 REMOTING_CLIENT_JNI_CHROMOTING_JNI_INSTANCE_H_
 #define REMOTING_CLIENT_JNI_CHROMOTING_JNI_INSTANCE_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 182 matching lines @@
 
   // The set of capabilities supported by the client. Accessed on the network
   // thread. Once SetCapabilities() is called, this will contain the negotiated
   // set of capabilities for this remoting session.
   std::string capabilities_;
 
   // Indicates whether the client is connected to the host. Used on network
   // thread.
   bool connected_ = false;
 
+  base::WeakPtr<ChromotingJniInstance> weak_ptr_;
   base::WeakPtrFactory<ChromotingJniInstance> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromotingJniInstance);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_CLIENT_JNI_CHROMOTING_JNI_INSTANCE_H_