Implement BluetoothRemoteGattCharacteristicWin::StartNotifySession and related unit tests

device/bluetooth/test/bluetooth_test_win.h

Index: device/bluetooth/test/bluetooth_test_win.h
diff --git a/device/bluetooth/test/bluetooth_test_win.h b/device/bluetooth/test/bluetooth_test_win.h
index 459b992b3dd8f1c054290d60bd0ec67a1c97ab09..d3ad3a2bc63de1b7671b1c400fd3fd1a3d33a3ed 100644
--- a/device/bluetooth/test/bluetooth_test_win.h
+++ b/device/bluetooth/test/bluetooth_test_win.h
@@ -20,7 +20,6 @@ class BluetoothRemoteGattCharacteristicWin;
 
 // Windows implementation of BluetoothTestBase.
 class BluetoothTestWin : public BluetoothTestBase,
-                         public BluetoothTaskManagerWin::Observer,
                          public win::BluetoothLowEnergyWrapperFake::Observer {
  public:
   BluetoothTestWin();
@@ -61,14 +60,17 @@ class BluetoothTestWin : public BluetoothTestBase,
   void DeleteDevice(BluetoothDevice* device) override;
   void SimulateGattDescriptor(BluetoothGattCharacteristic* characteristic,
                               const std::string& uuid) override;
-
-  // BluetoothTaskManagerWin::Observer overrides.
-  void OnAttemptReadGattCharacteristic() override;
-  void OnAttemptWriteGattCharacteristic() override;
+  void SimulateGattNotifySessionStarted(
+      BluetoothGattCharacteristic* characteristic) override;
+  void SimulateGattCharacteristicChanged(
+      BluetoothGattCharacteristic* characteristic,
+      const std::vector<uint8_t>& value) override;
 
   // win::BluetoothLowEnergyWrapperFake::Observer overrides.
-  void onWriteGattCharacteristicValue(
+  void OnReadGattCharacteristicValue() override;
+  void OnWriteGattCharacteristicValue(
       const PBTH_LE_GATT_CHARACTERISTIC_VALUE value) override;
+  void OnStartCharacteristicNotification() override;
 
  private:
   scoped_refptr<base::TestSimpleTaskRunner> ui_task_runner_;