Expose the bluetooth address of the adapter.

chrome/browser/chromeos/bluetooth/bluetooth_adapter.h

Index: chrome/browser/chromeos/bluetooth/bluetooth_adapter.h
diff --git a/chrome/browser/chromeos/bluetooth/bluetooth_adapter.h b/chrome/browser/chromeos/bluetooth/bluetooth_adapter.h
index 5c4f82fde902cbfe3c25241d90a6eed08249c632..6105eca0e046f7453c38a26eae25d4d9b7a71f9d 100644
--- a/chrome/browser/chromeos/bluetooth/bluetooth_adapter.h
+++ b/chrome/browser/chromeos/bluetooth/bluetooth_adapter.h
@@ -91,6 +91,10 @@ class BluetoothAdapter : private BluetoothManagerClient::Observer,
   // is called, in the success case the callback is simply not called.
   typedef base::Callback<void()> ErrorCallback;
 
+  // The address of this adapter.  The address format is "XX:XX:XX:XX:XX:XX",
+  // where each XX is a hexadecimal number.
+  const std::string& address() const { return address_; }
+
   // Indicates whether the adapter is actually present on the system, for
   // the default adapter this indicates whether any adapter is present.
   bool IsPresent() const;
@@ -274,6 +278,9 @@ class BluetoothAdapter : private BluetoothManagerClient::Observer,
   bool track_default_;
   dbus::ObjectPath object_path_;
 
+  // Address of the adapter.
+  std::string address_;
+
   // Tracked adapter state, cached locally so we only send change notifications
   // to observers on a genuine change.
   bool powered_;