Implement chrome.bluetoothLowEnergy.resetAdvertising().

device/bluetooth/dbus/fake_bluetooth_le_advertising_manager_client.cc

Index: device/bluetooth/dbus/fake_bluetooth_le_advertising_manager_client.cc
diff --git a/device/bluetooth/dbus/fake_bluetooth_le_advertising_manager_client.cc b/device/bluetooth/dbus/fake_bluetooth_le_advertising_manager_client.cc
index 6236ca78f0bac0ec3e93f013b209387a286b2f2a..5586a6c2d15b1301758fe3c7dd7a234d555c88f9 100644
--- a/device/bluetooth/dbus/fake_bluetooth_le_advertising_manager_client.cc
+++ b/device/bluetooth/dbus/fake_bluetooth_le_advertising_manager_client.cc
@@ -108,6 +108,15 @@ void FakeBluetoothLEAdvertisingManagerClient::SetAdvertisingInterval(
   callback.Run();
 }
 
+void FakeBluetoothLEAdvertisingManagerClient::ResetAdvertising(
+    const dbus::ObjectPath& object_path,
+    const base::Closure& callback,
+    const ErrorCallback& error_callback) {
+  currently_registered_.clear();
+  service_provider_map_.clear();
+  callback.Run();
+}
+
 void FakeBluetoothLEAdvertisingManagerClient::
     RegisterAdvertisementServiceProvider(
         FakeBluetoothLEAdvertisementServiceProvider* service_provider) {