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

chrome/browser/media/router/discovery/mdns/dns_sd_registry_unittest.cc

 // Copyright 2013 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 "chrome/browser/media/router/discovery/mdns/dns_sd_registry.h"
 #include "chrome/browser/media/router/discovery/mdns/dns_sd_delegate.h"
 #include "chrome/browser/media/router/discovery/mdns/dns_sd_device_lister.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace media_router {
 
 class MockDnsSdDeviceLister : public DnsSdDeviceLister {
  public:
   MockDnsSdDeviceLister() : DnsSdDeviceLister(NULL, NULL, "") {}
   ~MockDnsSdDeviceLister() override {}
 
-  MOCK_METHOD1(Discover, void(bool force_update));
+  MOCK_METHOD0(Discover, void());
 };
 
 class TestDnsSdRegistry : public DnsSdRegistry {
  public:
   TestDnsSdRegistry() : DnsSdRegistry(NULL), delegate_(NULL) {}
   ~TestDnsSdRegistry() override {}
 
   MockDnsSdDeviceLister* GetListerForService(const std::string& service_type) {
     return listers_[service_type];
   }
@@ skipping 80 matching lines @@
   EXPECT_CALL(observer_,
               OnDnsSdEvent(service_type1, DnsSdRegistry::DnsSdServiceList()));
   EXPECT_CALL(observer_,
               OnDnsSdEvent(service_type2, DnsSdRegistry::DnsSdServiceList()));
 
   registry_->RegisterDnsSdListener(service_type1);
   registry_->RegisterDnsSdListener(service_type2);
   EXPECT_EQ(1, registry_->GetServiceListenerCount(service_type1));
   EXPECT_EQ(1, registry_->GetServiceListenerCount(service_type2));
 
-  EXPECT_CALL(*registry_->GetLister(service_type1), Discover(false));
-  EXPECT_CALL(*registry_->GetLister(service_type2), Discover(false));
+  EXPECT_CALL(*registry_->GetLister(service_type1), Discover());
+  EXPECT_CALL(*registry_->GetLister(service_type2), Discover());
   registry_->ForceDiscovery();
 }
 
 // Tests registering a listener and receiving an added and updated event.
 TEST_F(DnsSdRegistryTest, AddAndUpdate) {
   const std::string service_type = "_testing._tcp.local";
   const std::string ip_address1 = "192.168.0.100";
   const std::string ip_address2 = "192.168.0.101";
 
   DnsSdService service;
@@ skipping 124 matching lines @@
   service.ip_address = "192.168.0.100";
   registry_->GetDelegate()->ServiceChanged(service_type, true, service);
   // Update with changed ip address.
   service.ip_address = "192.168.0.101";
   registry_->GetDelegate()->ServiceChanged(service_type, false, service);
   // Update with no changes to the service.
   registry_->GetDelegate()->ServiceChanged(service_type, false, service);
 }
 
 }  // namespace media_router