Register for HID device notifications on Windows.

device/hid/hid_connection_win.h

Index: device/hid/hid_connection_win.h
diff --git a/device/hid/hid_connection_win.h b/device/hid/hid_connection_win.h
index b3e3ce4e5b334dfae07bc70ddb29dc5a075a7fa5..9a4d0c5411f7e9ca47e6d64ddb7d1539dfc021af 100644
--- a/device/hid/hid_connection_win.h
+++ b/device/hid/hid_connection_win.h
@@ -18,7 +18,8 @@ struct PendingHidTransfer;
 
 class HidConnectionWin : public HidConnection {
  public:
-  explicit HidConnectionWin(const HidDeviceInfo& device_info);
+  HidConnectionWin(const HidDeviceInfo& device_info,
+                   base::win::ScopedHandle file);
 
  private:
   friend class HidServiceWin;
@@ -39,8 +40,6 @@ class HidConnectionWin : public HidConnection {
       size_t size,
       const WriteCallback& callback) override;
 
-  bool available() const { return file_.IsValid(); }
-
   void OnReadComplete(scoped_refptr<net::IOBuffer> buffer,
                       const ReadCallback& callback,
                       PendingHidTransfer* transfer,