Implement BluetoothRemoteGattCharacteristicWin::GetDescriptors

device/bluetooth/bluetooth_remote_gatt_characteristic_win.h

Index: device/bluetooth/bluetooth_remote_gatt_characteristic_win.h
diff --git a/device/bluetooth/bluetooth_remote_gatt_characteristic_win.h b/device/bluetooth/bluetooth_remote_gatt_characteristic_win.h
index f397363f500d1e606fb935949cce3cb73910732b..98601163ccbe35051dbf82cc3b048456019ea4be 100644
--- a/device/bluetooth/bluetooth_remote_gatt_characteristic_win.h
+++ b/device/bluetooth/bluetooth_remote_gatt_characteristic_win.h
@@ -5,6 +5,8 @@
 #ifndef DEVICE_BLUETOOTH_BLUETOOTH_REMOTE_GATT_CHARACTERISTIC_WIN_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_REMOTE_GATT_CHARACTERISTIC_WIN_H_
 
+#include <unordered_map>
+
 #include "base/memory/weak_ptr.h"
 #include "base/sequenced_task_runner.h"
 #include "device/bluetooth/bluetooth_gatt_characteristic.h"
@@ -13,6 +15,7 @@
 namespace device {
 
 class BluetoothAdapterWin;
+class BluetoothRemoteGattDescriptorWin;
 class BluetoothRemoteGattServiceWin;
 class BluetoothTaskManagerWin;
 
@@ -52,9 +55,26 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothRemoteGattCharacteristicWin
   // Update included descriptors.
   void Update();
   uint16_t GetAttributeHandle() const;
+  BluetoothRemoteGattServiceWin* GetWinService() { return parent_service_; }
 
  private:
-  BluetoothAdapterWin* adapter_;
+  void OnGetIncludedDescriptorsCallback(
+      scoped_ptr<BTH_LE_GATT_DESCRIPTOR> descriptors,
+      uint16_t num,
+      HRESULT hr);
+  void UpdateIncludedDescriptors(PBTH_LE_GATT_DESCRIPTOR descriptors,
+                                 uint16_t num);
+
+  // Checks if the descriptor with |uuid| and |attribute_handle| has already
+  // been discovered as included descriptor.
+  bool IsDescriptorDiscovered(BTH_LE_UUID& uuid, uint16_t attribute_handle);
+
+  // Checks if |descriptor| still exists in this characteristic according to
+  // newly discovered |num| of |descriptors|.
+  static bool DoesDescriptorExist(PBTH_LE_GATT_DESCRIPTOR descriptors,
+                                  uint16_t num,
+                                  BluetoothRemoteGattDescriptorWin* descriptor);
+
   BluetoothRemoteGattServiceWin* parent_service_;
   scoped_refptr<BluetoothTaskManagerWin> task_manager_;
 
@@ -65,6 +85,17 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothRemoteGattCharacteristicWin
   std::vector<uint8_t> characteristic_value_;
   std::string characteristic_identifier_;
 
+  // The key of GattDescriptorMap is the identitfier of
+  // BluetoothRemoteGattDescriptorWin instance.
+  typedef std::unordered_map<std::string,
+                             scoped_ptr<BluetoothRemoteGattDescriptorWin>>
+      GattDescriptorMap;
+  GattDescriptorMap included_descriptors_;
+
+  // Flag indicates if characteristic added notification of this characteristic
+  // has been sent out to avoid duplicate notification.
+  bool characteristic_added_notified_;
+
   base::WeakPtrFactory<BluetoothRemoteGattCharacteristicWin> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(BluetoothRemoteGattCharacteristicWin);
 };