Clean up HID backend and API.

device/hid/hid_connection_win.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_WIN_H_
 #define DEVICE_HID_HID_CONNECTION_WIN_H_
 
+#include <windows.h>
+
 #include <set>
-#include <windows.h>
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/thread_checker.h"
 #include "base/win/object_watcher.h"
 #include "device/hid/hid_connection.h"
 #include "device/hid/hid_device_info.h"
-#include "net/base/io_buffer.h"
 
 namespace device {
 
 class HidConnectionWin : public HidConnection {
  public:
   struct PendingTransfer : public base::RefCounted<PendingTransfer>,
                            public base::win::ObjectWatcher::Delegate,
                            public base::MessageLoop::DestructionObserver {
    public:
     PendingTransfer(scoped_refptr<HidConnectionWin> conn,
-                    scoped_refptr<net::IOBuffer> target,
-                    scoped_refptr<net::IOBuffer> receiving,
+                    scoped_refptr<net::IOBufferWithSize> target,
+                    scoped_refptr<net::IOBufferWithSize> receiving,
                     bool is_input,
                     IOCallback callback);
 
     void TakeResultFromWindowsAPI(BOOL result);
 
     OVERLAPPED* GetOverlapped() { return &overlapped_; }
 
     // Implements base::win::ObjectWatcher::Delegate.
     virtual void OnObjectSignaled(HANDLE object) OVERRIDE;
 
     // Implements base::MessageLoop::DestructionObserver
     virtual void WillDestroyCurrentMessageLoop() OVERRIDE;
 
 
    private:
     friend class base::RefCounted<PendingTransfer>;
     friend class HidConnectionWin;
 
     virtual ~PendingTransfer();
 
     scoped_refptr<HidConnectionWin> conn_;
     bool is_input_;
-    scoped_refptr<net::IOBuffer> target_;
-    scoped_refptr<net::IOBuffer> receiving_;
+    scoped_refptr<net::IOBufferWithSize> target_;
+    scoped_refptr<net::IOBufferWithSize> receiving_;
     IOCallback callback_;
     OVERLAPPED overlapped_;
     base::win::ScopedHandle event_;
     base::win::ObjectWatcher watcher_;
 
     DISALLOW_COPY_AND_ASSIGN(PendingTransfer);
   };
 
-  HidConnectionWin(HidDeviceInfo device_info);
+  HidConnectionWin(HidDeviceInfo device_info, const std::string& device_path);
 
-  virtual void Read(scoped_refptr<net::IOBuffer> buffer,
-                    size_t size,
+  bool available() const;
+
+  virtual void Read(scoped_refptr<net::IOBufferWithSize> buffer,
                     const IOCallback& callback) OVERRIDE;
-  virtual void Write(scoped_refptr<net::IOBuffer> buffer,
-                     size_t size,
+  virtual void Write(scoped_refptr<net::IOBufferWithSize> buffer,
                      const IOCallback& callback) OVERRIDE;
-  virtual void GetFeatureReport(scoped_refptr<net::IOBuffer> buffer,
-                                size_t size,
+  virtual void GetFeatureReport(scoped_refptr<net::IOBufferWithSize> buffer,
                                 const IOCallback& callback) OVERRIDE;
-  virtual void SendFeatureReport(scoped_refptr<net::IOBuffer> buffer,
-                                 size_t size,
+  virtual void SendFeatureReport(scoped_refptr<net::IOBufferWithSize> buffer,
                                  const IOCallback& callback) OVERRIDE;
 
   void OnTransferFinished(scoped_refptr<PendingTransfer> transfer);
   void OnTransferCanceled(scoped_refptr<PendingTransfer> transfer);
 
-  bool available() const { return available_; }
-
  private:
   ~HidConnectionWin();
 
   base::win::ScopedHandle file_;
   std::set<scoped_refptr<PendingTransfer> > transfers_;
 
   DISALLOW_COPY_AND_ASSIGN(HidConnectionWin);
-
-  bool available_;
 };
 
 }  // namespace device
 
 #endif  // DEVICE_HID_HID_CONNECTION_WIN_H_