[EasyUnlock] Port PermitMessage class to native code.

components/proximity_auth/connection.h

 // Copyright 2014 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 COMPONENTS_PROXIMITY_AUTH_CONNECTION_H
 #define COMPONENTS_PROXIMITY_AUTH_CONNECTION_H
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 57 matching lines @@
 
   // Called when bytes are read from the connection. There should not be a send
   // in progress when this function is called.
   void OnBytesReceived(const std::string& bytes);
 
   // Sends bytes over the connection. The implementing class should call
   // OnSendCompleted() once the send succeeds or fails. At most one send will be
   // in progress.
   virtual void SendMessageImpl(scoped_ptr<WireMessage> message) = 0;
 
-  // Returns |true| iff the |received_bytes_| are long enough to contain a
-  // complete wire message. Exposed for testing.
-  virtual bool HasReceivedCompleteMessage();
-
   // Deserializes the |recieved_bytes_| and returns the resulting WireMessage,
-  // or NULL if the message is malformed. Exposed for testing.
-  virtual scoped_ptr<WireMessage> DeserializeWireMessage();
+  // or NULL if the message is malformed. Sets |is_incomplete_message| to true
+  // if the |serialized_message| does not have enough data to parse the header,
+  // or if the message length encoded in the message header exceeds the size of
+  // the |serialized_message|. Exposed for testing.
+  virtual scoped_ptr<WireMessage> DeserializeWireMessage(
+      bool* is_incomplete_message);
 
  private:
   // The remote device corresponding to this connection.
   const RemoteDevice remote_device_;
 
   // The current status of the connection.
   Status status_;
 
   // The registered observers of the connection.
   ObserverList<ConnectionObserver> observers_;
 
   // A temporary buffer storing bytes received before a received message can be
   // fully constructed.
   std::string received_bytes_;
 
   // Whether a message is currently in the process of being sent.
   bool is_sending_message_;
 
   DISALLOW_COPY_AND_ASSIGN(Connection);
 };
 
 }  // namespace proximity_auth
 
 #endif  // COMPONENTS_PROXIMITY_AUTH_CONNECTION_H