HID backend.

This is a continuation of https://codereview.chromium.org/143883005.
[ps#1 here is (post-revert) ps#12 there.]

BUG=290428
TBR=miket@chromium.org

Review URL: https://codereview.chromium.org/150773004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248250 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 54 insertions, 0 deletions

diff --git a/device/hid/hid_connection.h b/device/hid/hid_connection.h
new file mode 100644
index 0000000..27792c4
--- /dev/null
+++ b/device/hid/hid_connection.h
@@ -0,0 +1,54 @@
+// 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_H_
+#define DEVICE_HID_HID_CONNECTION_H_
+
+#include "base/callback.h"
+#include "base/memory/ref_counted.h"
+#include "base/threading/thread_checker.h"
+#include "device/hid/hid_device_info.h"
+
+namespace net {
+class IOBuffer;
+}
+
+namespace device {
+
+class HidConnection : public base::RefCountedThreadSafe<HidConnection> {
+ public:
+  typedef base::Callback<void(bool success, size_t size)> IOCallback;
+
+  virtual void Read(scoped_refptr<net::IOBuffer> buffer,
+                    size_t size,
+                    const IOCallback& callback) = 0;
+  virtual void Write(scoped_refptr<net::IOBuffer> buffer,
+                     size_t size,
+                     const IOCallback& callback) = 0;
+  virtual void GetFeatureReport(scoped_refptr<net::IOBuffer> buffer,
+                                size_t size,
+                                const IOCallback& callback) = 0;
+  virtual void SendFeatureReport(scoped_refptr<net::IOBuffer> buffer,
+                                 size_t size,
+                                 const IOCallback& callback) = 0;
+
+  const HidDeviceInfo& device_info() const;
+
+ protected:
+  friend class base::RefCountedThreadSafe<HidConnection>;
+  friend struct HidDeviceInfo;
+
+  HidConnection(HidDeviceInfo device_info);
+  virtual ~HidConnection();
+
+  const HidDeviceInfo device_info_;
+
+  base::ThreadChecker thread_checker_;
+
+  DISALLOW_COPY_AND_ASSIGN(HidConnection);
+};
+
+}  // namespace device
+
+#endif  // DEVICE_HID_HID_CONNECTION_H_