Implement BluetoothRemoteGattServiceWin and related unit tests

device/bluetooth/bluetooth_low_energy_win.h

Index: device/bluetooth/bluetooth_low_energy_win.h
diff --git a/device/bluetooth/bluetooth_low_energy_win.h b/device/bluetooth/bluetooth_low_energy_win.h
index 9d924350433b5afbc9d86eb770eb397d148c740b..a2bae9e4e6cc4cceb01ee6346b68d0d77c525216 100644
--- a/device/bluetooth/bluetooth_low_energy_win.h
+++ b/device/bluetooth/bluetooth_low_energy_win.h
@@ -74,9 +74,6 @@ class DEVICE_BLUETOOTH_EXPORT DevicePropertyValue {
   DISALLOW_COPY_AND_ASSIGN(DevicePropertyValue);
 };
 
-// Returns true only on Windows platforms supporting Bluetooth Low Energy.
-bool DEVICE_BLUETOOTH_EXPORT IsBluetoothLowEnergySupported();
-
 struct DEVICE_BLUETOOTH_EXPORT BluetoothLowEnergyServiceInfo {
   BluetoothLowEnergyServiceInfo();
   ~BluetoothLowEnergyServiceInfo();
@@ -113,6 +110,9 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothLowEnergyWrapper {
   static void DeleteInstance();
   static void SetInstanceForTest(BluetoothLowEnergyWrapper* instance);
 
+  // Returns true only on Windows platforms supporting Bluetooth Low Energy.
+  virtual bool IsBluetoothLowEnergySupported();
+
   // Enumerates the list of known (i.e. already paired) Bluetooth LE devices on
   // this machine. In case of error, returns false and sets |error| with an
   // error message describing the problem.
@@ -144,6 +144,15 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothLowEnergyWrapper {
       ScopedVector<BluetoothLowEnergyServiceInfo>* services,
       std::string* error);
 
+  // Reads characteristics of |service| with service device path |service_path|.
+  // The result will be stored in |*out_included_characteristics| and
+  // |*out_counts|.
+  virtual HRESULT ReadCharacteristicsOfAService(
+      base::FilePath& service_path,
+      const PBTH_LE_GATT_SERVICE service,
+      scoped_ptr<BTH_LE_GATT_CHARACTERISTIC>* out_included_characteristics,
+      USHORT* out_counts);
+
  protected:
   BluetoothLowEnergyWrapper();
   virtual ~BluetoothLowEnergyWrapper();