Revert of Add support in Chrome to send notifications to a specific device.

device/bluetooth/test/bluetooth_test_bluez.cc

Index: device/bluetooth/test/bluetooth_test_bluez.cc
diff --git a/device/bluetooth/test/bluetooth_test_bluez.cc b/device/bluetooth/test/bluetooth_test_bluez.cc
index 537da559c8f3ecb21b4e11c07eb4d697db2bb569..f1188ed64b99d7093cc892d977671510eaadb123 100644
--- a/device/bluetooth/test/bluetooth_test_bluez.cc
+++ b/device/bluetooth/test/bluetooth_test_bluez.cc
@@ -5,7 +5,6 @@
 #include "device/bluetooth/test/bluetooth_test_bluez.h"
 
 #include <string>
-#include <tuple>
 #include <utility>
 
 #include "base/bind.h"
@@ -279,8 +278,7 @@
   return characteristic_provider->NotificationsChange(start);
 }
 
-BluetoothTestBase::NotificationType
-BluetoothTestBlueZ::LastNotifactionValueForCharacteristic(
+std::vector<uint8_t> BluetoothTestBlueZ::LastNotifactionValueForCharacteristic(
     BluetoothLocalGattCharacteristic* characteristic) {
   bluez::BluetoothLocalGattCharacteristicBlueZ* characteristic_bluez =
       static_cast<bluez::BluetoothLocalGattCharacteristicBlueZ*>(
@@ -293,22 +291,8 @@
           fake_bluetooth_gatt_manager_client->GetCharacteristicServiceProvider(
               characteristic_bluez->object_path());
 
-  if (!characteristic_provider)
-    return NotificationType();
-
-  bluez::BluetoothAdapterBlueZ* adapter_bluez =
-      static_cast<bluez::BluetoothAdapterBlueZ*>(adapter_.get());
-
-  std::string device_id;
-  bluez::BluetoothDeviceBlueZ* device = adapter_bluez->GetDeviceWithPath(
-      characteristic_provider->last_device_path());
-  if (device)
-    device_id = device->GetIdentifier();
-
-  NotificationType notification = {
-      device_id, characteristic_provider->last_value(),
-      characteristic_provider->last_indicate_flag()};
-  return notification;
+  return characteristic_provider ? characteristic_provider->sent_value()
+                                 : std::vector<uint8_t>();
 }
 
 std::vector<BluetoothLocalGattService*>