Fixing a Dr. Memory hang in the remoting_unittests

remoting/host/security_key/remote_security_key_message_reader_impl.h

 // Copyright 2016 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_HOST_SECURITY_KEY_REMOTE_SECURITY_KEY_MESSAGE_READER_IMPL_H_
 #define REMOTING_HOST_SECURITY_KEY_REMOTE_SECURITY_KEY_MESSAGE_READER_IMPL_H_
 
 #include <memory>
 
 #include "base/callback.h"
@@ skipping 20 matching lines @@
 
   // RemoteSecurityKeyMessageReader interface.
   void Start(const SecurityKeyMessageCallback& message_callback,
              const base::Closure& error_callback) override;
 
  private:
   // Reads a message from the remote security key process and passes it to
   // |message_callback_| on the originating thread. Run on |read_task_runner_|.
   void ReadMessage();
 
+  // Reads the nubmer of bytes indicated by |bytes_to_read| into |buffer| from
+  // |read_stream_|.  Returns true if all bytes were retrieved successfully.
+  bool ReadFromStream(char* buffer, size_t bytes_to_read);
+
   // Callback run on |read_task_runner_| when an error occurs or EOF is reached.
   void NotifyError();
 
   // Used for callbacks on the appropriate task runner to signal status changes.
   // These callbacks are invoked on |main_task_runner_|.
   void InvokeMessageCallback(std::unique_ptr<SecurityKeyMessage> message);
   void InvokeErrorCallback();
 
   base::File read_stream_;
 
   // Caller-supplied message and error callbacks.
   SecurityKeyMessageCallback message_callback_;
   base::Closure error_callback_;
 
   // Thread used for blocking IO operations.
   base::Thread reader_thread_;
   scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
   scoped_refptr<base::SingleThreadTaskRunner> read_task_runner_;
 
   base::WeakPtr<RemoteSecurityKeyMessageReaderImpl> reader_;
   base::WeakPtrFactory<RemoteSecurityKeyMessageReaderImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RemoteSecurityKeyMessageReaderImpl);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_SECURITY_KEY_REMOTE_SECURITY_KEY_MESSAGE_READER_IMPL_H_