Remove the (broken and unneeded) 'force_update' option from ServiceWatcher::DiscoverNewDevices.

chrome/browser/local_discovery/service_discovery_client_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdint.h>
 
 #include "base/location.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
@@ skipping 248 matching lines @@
   StrictMock<MockServiceWatcherClient> delegate;
 
   std::unique_ptr<ServiceWatcher> watcher(
       service_discovery_client_.CreateServiceWatcher("_privet._tcp.local",
                                                      delegate.GetCallback()));
 
   watcher->Start();
 
   EXPECT_CALL(socket_factory_, OnSendTo(_)).Times(2);
 
-  watcher->DiscoverNewServices(false);
+  watcher->DiscoverNewServices();
 
   EXPECT_CALL(socket_factory_, OnSendTo(_)).Times(2);
 
   RunFor(base::TimeDelta::FromSeconds(2));
 }
 
 TEST_F(ServiceDiscoveryTest, ReadCachedServices) {
   socket_factory_.SimulateReceive(kSamplePacketPTR, sizeof(kSamplePacketPTR));
-
   StrictMock<MockServiceWatcherClient> delegate;
 
   std::unique_ptr<ServiceWatcher> watcher(
       service_discovery_client_.CreateServiceWatcher("_privet._tcp.local",
                                                      delegate.GetCallback()));
 
   watcher->Start();
 
   EXPECT_CALL(delegate, OnServiceUpdated(ServiceWatcher::UPDATE_ADDED,
                                          "hello._privet._tcp.local"))
@@ skipping 218 matching lines @@
                          ServiceResolver::STATUS_REQUEST_TIMEOUT, _, _, _));
 
   // TODO(noamsml): When NSEC record support is added, change this to use an
   // NSEC record.
   RunFor(base::TimeDelta::FromSeconds(4));
 }
 
 }  // namespace
 
 }  // namespace local_discovery