Find HID report IDs in output and feature reports on Windows.

device/hid/hid_service_win.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_SERVICE_WIN_H_
 #define DEVICE_HID_HID_SERVICE_WIN_H_
 
 #include <map>
 
 #include "device/hid/hid_device_info.h"
 #include "device/hid/hid_service.h"
 
+#if defined(OS_WIN)
+
+#define INITGUID

[rpaquay, 2014/08/22 21:36:30]

I am surprised this works, as usually INITGUID is used in .cc files to avoid
defining the same GUID multiple times and getting linker errors. Am I missing
something?

[Reilly Grant (use Gerrit), 2014/08/22 21:54:54]

It works but probably only because of the limited usage of this header. I move
it when chasing another compilation issue but it wasn't necessary.

+
+#include <windows.h>
+#include <hidclass.h>
+
+extern "C" {
+#include <hidsdi.h>
+#include <hidpi.h>
+}
+
+#endif  // defined(OS_WIN)
+
 namespace device {
 
 class HidConnection;
 
 class HidServiceWin : public HidService {
  public:
   HidServiceWin();
 
   virtual void GetDevices(std::vector<HidDeviceInfo>* devices) OVERRIDE;
 
   virtual scoped_refptr<HidConnection> Connect(const HidDeviceId& device_id)
       OVERRIDE;
 
  private:
   virtual ~HidServiceWin();
 
   void Enumerate();
+  static void CollectInfoFromButtonCaps(PHIDP_PREPARSED_DATA preparsed_data,
+                                        HIDP_REPORT_TYPE report_type,
+                                        USHORT button_caps_length,
+                                        HidCollectionInfo* collection_info);
+  static void CollectInfoFromValueCaps(PHIDP_PREPARSED_DATA preparsed_data,
+                                       HIDP_REPORT_TYPE report_type,
+                                       USHORT value_caps_length,
+                                       HidCollectionInfo* collection_info);
   void PlatformAddDevice(const std::string& device_path);
   void PlatformRemoveDevice(const std::string& device_path);
 
   DISALLOW_COPY_AND_ASSIGN(HidServiceWin);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_HID_HID_SERVICE_WIN_H_