Revert of Implement BluetoothGattNotifySession::Stop on Android

device/bluetooth/bluetooth_gatt_notify_session_mac.mm

Index: device/bluetooth/bluetooth_gatt_notify_session_mac.mm
diff --git a/device/bluetooth/bluetooth_gatt_notify_session_mac.mm b/device/bluetooth/bluetooth_gatt_notify_session_mac.mm
new file mode 100644
index 0000000000000000000000000000000000000000..f070c37bd923977c282c5cd04424e16405738dbd
--- /dev/null
+++ b/device/bluetooth/bluetooth_gatt_notify_session_mac.mm
@@ -0,0 +1,28 @@
+// Copyright 2016 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.
+
+#include "device/bluetooth/bluetooth_gatt_notify_session_mac.h"
+
+namespace device {
+BluetoothGattNotifySessionMac::BluetoothGattNotifySessionMac(
+    base::WeakPtr<BluetoothRemoteGattCharacteristicMac> characteristic)
+    : characteristic_(characteristic) {}
+
+BluetoothGattNotifySessionMac::~BluetoothGattNotifySessionMac() {}
+
+std::string BluetoothGattNotifySessionMac::GetCharacteristicIdentifier() const {
+  if (characteristic_.get())
+    return characteristic_->GetIdentifier();
+  return std::string();
+}
+
+bool BluetoothGattNotifySessionMac::IsActive() {
+  return characteristic_.get() != nullptr;
+}
+
+void BluetoothGattNotifySessionMac::Stop(const base::Closure& callback) {
+  NOTIMPLEMENTED();
+}
+
+}  // namespace device