Clean up HID backend and API.

chrome/browser/extensions/api/hid/hid_device_manager.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 CHROME_BROWSER_EXTENSIONS_API_HID_HID_DEVICE_MANAGER_H_
+#define CHROME_BROWSER_EXTENSIONS_API_HID_HID_DEVICE_MANAGER_H_
+
+#include <stdint.h>
+
+#include <map>
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/threading/thread_checker.h"
+#include "chrome/browser/extensions/api/profile_keyed_api_factory.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/extensions/api/hid.h"
+#include "device/hid/hid_device_info.h"
+
+namespace extensions {
+
+class HidDeviceManager : public ProfileKeyedAPI {
+ public:
+  explicit HidDeviceManager(content::BrowserContext* context);
+  virtual ~HidDeviceManager();
+
+  // ProfileKeyedAPI implementation.
+  static ProfileKeyedAPIFactory<HidDeviceManager>* GetFactoryInstance();
+
+  // Convenience method to get the HidDeviceManager for a profile.
+  static HidDeviceManager* Get(content::BrowserContext* context) {
+    return ProfileKeyedAPIFactory<HidDeviceManager>::GetForProfile(context);
+  }
+
+  scoped_ptr<base::ListValue> GetApiDevices(uint16_t vendor_id,
+                                            uint16_t product_id);
+
+  bool GetDeviceInfo(int resource_id, device::HidDeviceInfo* device_info);
+
+ private:
+  friend class ProfileKeyedAPIFactory<HidDeviceManager>;
+
+  static const char* service_name() { return "HidDeviceManager"; }
+
+  void UpdateDevices();
+
+  base::ThreadChecker thread_checker_;
+
+  int next_resource_id_;
+
+  typedef std::map<int, device::HidDeviceId> ResourceIdToDeviceIdMap;
+  typedef std::map<device::HidDeviceId, int> DeviceIdToResourceIdMap;
+
+  ResourceIdToDeviceIdMap device_ids_;
+  DeviceIdToResourceIdMap resource_ids_;
+
+  DISALLOW_COPY_AND_ASSIGN(HidDeviceManager);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_API_HID_HID_DEVICE_MANAGER_H_