Bluetooth: Add service data unit tests for chromeos

device/bluetooth/test/bluetooth_test.h

Index: device/bluetooth/test/bluetooth_test.h
diff --git a/device/bluetooth/test/bluetooth_test.h b/device/bluetooth/test/bluetooth_test.h
index 96fca52895d0c1a00fc81921cedaa91715a505ad..b6610ea903143e8b198ed24067cdd7c6446f6c0c 100644
--- a/device/bluetooth/test/bluetooth_test.h
+++ b/device/bluetooth/test/bluetooth_test.h
@@ -130,6 +130,14 @@ class BluetoothTestBase : public testing::Test {
   virtual bool DenyPermission();
 
   // Create a fake Low Energy device and discover it.
+  // |device_ordinal| with the same device address stands for the same fake
+  // device with different properties.
+  // For example:
+  // SimulateLowEnergyDevice(2); << First call will create a device with address
+  // kTestDeviceAddress1
+  // SimulateLowEnergyDevice(3); << Second call will update changes to the
+  // device of address kTestDeviceAddress1.
+  //
   // |device_ordinal| selects between multiple fake device data sets to produce:
   //   1: Name: kTestDeviceName
   //      Address:           kTestDeviceAddress1
@@ -141,8 +149,8 @@ class BluetoothTestBase : public testing::Test {
   //      Address:           kTestDeviceAddress1
   //      RSSI:              kTestRSSI2
   //      Advertised UUIDs: {kTestUUIDImmediateAlert, kTestUUIDLinkLoss}
-  //      Service Data:     {kTestUUIDHeartRate: [2],
-  //                         kTestUUIDImmediateAlert: [0]}
+  //      Service Data:     {kTestUUIDHeartRate: [],
+  //                         kTestUUIDImmediateAlert: [0, 2]}
   //      Tx Power:          kTestTxPower2
   //   3: Name:    kTestDeviceNameEmpty
   //      Address: kTestDeviceAddress1