bluetooth: Expose service data from BlueZ

device/bluetooth/bluetooth_device.h

Index: device/bluetooth/bluetooth_device.h
diff --git a/device/bluetooth/bluetooth_device.h b/device/bluetooth/bluetooth_device.h
index a4cabdf6891e7348cf450c0a853bb3fb448002bc..ae8651bebc2d5a5066527302726e0e8ae072c5e5 100644
--- a/device/bluetooth/bluetooth_device.h
+++ b/device/bluetooth/bluetooth_device.h
@@ -317,13 +317,17 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothDevice {
   //    returns the UUIDs of the device's services.
   //  * For dual mode devices this may be collected from both.
   //
-  // Note: On ChromeOS and Linux, Bluez persists all services meaning if
+  // Note: On ChromeOS and Linux, BlueZ persists all services meaning if
   // a device stops advertising a service this function will still return
   // its UUID.
   virtual UUIDSet GetUUIDs() const;
 
   // Returns the last advertised Service Data. Returns an empty map if the
   // adapter is not discovering.
+  //
+  // Note: On ChromeOS and Linux, BlueZ persists all service data meaning if
+  // a device stops advertising service data for a UUID, this function will
+  // still return the cached value for that UUID.
   const ServiceDataMap& GetServiceData() const;
 
   // Returns the UUIDs of services for which the device advertises Service Data.