Convert HidDeviceInfo from a struct to a refcounted class.

device/hid/hid_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 DEVICE_HID_HID_CONNECTION_H_
 #define DEVICE_HID_HID_CONNECTION_H_
 
 #include <stdint.h>
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread_checker.h"
 #include "device/hid/hid_device_info.h"
 #include "net/base/io_buffer.h"
 
 namespace device {
 
 class HidConnection : public base::RefCountedThreadSafe<HidConnection> {
  public:
   enum SpecialReportIds {
     kNullReportId = 0x00,
     kAnyReportId = 0xFF,
   };
 
   typedef base::Callback<
       void(bool success, scoped_refptr<net::IOBuffer> buffer, size_t size)>
       ReadCallback;
   typedef base::Callback<void(bool success)> WriteCallback;
 
-  const HidDeviceInfo& device_info() const { return device_info_; }
+  scoped_refptr<HidDeviceInfo> device_info() const { return device_info_; }
   bool has_protected_collection() const { return has_protected_collection_; }
   const base::ThreadChecker& thread_checker() const { return thread_checker_; }
   bool closed() const { return closed_; }
 
   // Closes the connection. This must be called before the object is freed.
   void Close();
 
   // The report ID (or 0 if report IDs are not supported by the device) is
   // always returned in the first byte of the buffer.
   void Read(const ReadCallback& callback);
@@ skipping 11 matching lines @@
 
   // The report ID (or 0 if report IDs are not supported by the device) is
   // always expected in the first byte of the buffer.
   void SendFeatureReport(scoped_refptr<net::IOBuffer> buffer,
                          size_t size,
                          const WriteCallback& callback);
 
  protected:
   friend class base::RefCountedThreadSafe<HidConnection>;
 
-  explicit HidConnection(const HidDeviceInfo& device_info);
+  explicit HidConnection(scoped_refptr<HidDeviceInfo> device_info);
   virtual ~HidConnection();
 
   virtual void PlatformClose() = 0;
   virtual void PlatformRead(const ReadCallback& callback) = 0;
   virtual void PlatformWrite(scoped_refptr<net::IOBuffer> buffer,
                              size_t size,
                              const WriteCallback& callback) = 0;
   virtual void PlatformGetFeatureReport(uint8_t report_id,
                                         const ReadCallback& callback) = 0;
   virtual void PlatformSendFeatureReport(scoped_refptr<net::IOBuffer> buffer,
                                          size_t size,
                                          const WriteCallback& callback) = 0;
 
   // PlatformRead implementation must call this method on read
   // success, rather than directly running the callback.
   // In case incoming buffer is empty or protected, it is filtered
   // and this method returns false. Otherwise it runs the callback
   // and returns true.
   bool CompleteRead(scoped_refptr<net::IOBuffer> buffer,
                     size_t size,
                     const ReadCallback& callback);
 
  private:
   bool IsReportIdProtected(uint8_t report_id);
 
-  const HidDeviceInfo device_info_;
+  scoped_refptr<HidDeviceInfo> device_info_;
   bool has_protected_collection_;
   base::ThreadChecker thread_checker_;
   bool closed_;
 
   DISALLOW_COPY_AND_ASSIGN(HidConnection);
 };
 
 struct PendingHidReport {
   PendingHidReport();
   ~PendingHidReport();
 
   scoped_refptr<net::IOBuffer> buffer;
   size_t size;
 };
 
 struct PendingHidRead {
   PendingHidRead();
   ~PendingHidRead();
 
   HidConnection::ReadCallback callback;
 };
 
 }  // namespace device
 
 #endif  // DEVICE_HID_HID_CONNECTION_H_