Do not open or close IOHIDManager's IOHIDDeviceRefs.

device/hid/hid_connection_mac.h

 // Copyright (c) 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 DEVICE_HID_HID_CONNECTION_MAC_H_
 #define DEVICE_HID_HID_CONNECTION_MAC_H_
 
 #include <CoreFoundation/CoreFoundation.h>
 #include <IOKit/hid/IOHIDManager.h>
 
@@ skipping 44 matching lines @@
                    scoped_refptr<net::IOBuffer> buffer,
                    size_t size,
                    const WriteCallback& callback);
 
   void Flush();
   void ProcessInputReport(scoped_refptr<net::IOBufferWithSize> buffer);
   void ProcessReadQueue();
 
   base::ScopedCFTypeRef<IOHIDDeviceRef> device_;
   scoped_refptr<base::MessageLoopProxy> message_loop_;
-  scoped_ptr<uint8_t[]> inbound_buffer_;
+  std::vector<uint8_t> inbound_buffer_;
 
   std::queue<PendingHidReport> pending_reports_;
   std::queue<PendingHidRead> pending_reads_;
 
   DISALLOW_COPY_AND_ASSIGN(HidConnectionMac);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_HID_HID_CONNECTION_MAC_H_