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

device/bluetooth/test/bluetooth_test.cc

Index: device/bluetooth/test/bluetooth_test.cc
diff --git a/device/bluetooth/test/bluetooth_test.cc b/device/bluetooth/test/bluetooth_test.cc
index de47f463ad31415623f0027765b0a09e388a5ebb..61f741265f1cb9f020a1d19c94c480fb7f2a8e34 100644
--- a/device/bluetooth/test/bluetooth_test.cc
+++ b/device/bluetooth/test/bluetooth_test.cc
@@ -28,6 +28,23 @@ const std::string BluetoothTestBase::kTestUUIDGenericAttribute = "1801";
 const std::string BluetoothTestBase::kTestUUIDImmediateAlert = "1802";
 const std::string BluetoothTestBase::kTestUUIDLinkLoss = "1803";
 
+BluetoothTestBase::NotificationType::NotificationType() : indicate(false) {}
+
+BluetoothTestBase::NotificationType::NotificationType(
+    std::string device_path,
+    std::vector<uint8_t> value,
+    bool indicate)
+    : device_path(device_path), value(value), indicate(indicate) {}
+
+BluetoothTestBase::NotificationType::NotificationType(
+    const NotificationType& obj) {
+  this->device_path = obj.device_path;
+  this->value = obj.value;
+  this->indicate = obj.indicate;
+}
+
+BluetoothTestBase::NotificationType::~NotificationType() {}
+
 BluetoothTestBase::BluetoothTestBase() : weak_factory_(this) {}
 
 BluetoothTestBase::~BluetoothTestBase() {
@@ -75,10 +92,11 @@ bool BluetoothTestBase::SimulateLocalGattCharacteristicNotificationsRequest(
   return false;
 }
 
-std::vector<uint8_t> BluetoothTestBase::LastNotifactionValueForCharacteristic(
+BluetoothTestBase::NotificationType
+BluetoothTestBase::LastNotifactionValueForCharacteristic(
     BluetoothLocalGattCharacteristic* characteristic) {
   NOTIMPLEMENTED();
-  return std::vector<uint8_t>();
+  return NotificationType();
 }
 
 std::vector<BluetoothLocalGattService*>