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

chrome/browser/devtools/device/cast_device_provider.cc

Index: chrome/browser/devtools/device/cast_device_provider.cc
diff --git a/chrome/browser/devtools/device/cast_device_provider.cc b/chrome/browser/devtools/device/cast_device_provider.cc
index 8ee6714b2c5caa2f8be4be6c741f209ed5d9ae2c..53d8e6d02dd51d0994dbb3556904f10f685aa854 100644
--- a/chrome/browser/devtools/device/cast_device_provider.cc
+++ b/chrome/browser/devtools/device/cast_device_provider.cc
@@ -7,6 +7,7 @@
 #include <map>
 #include <set>
 #include <string>
+#include <utility>
 #include <vector>
 
 #include "base/single_thread_task_runner.h"
@@ -104,7 +105,7 @@ class CastDeviceProvider::DeviceListerDelegate
     device_lister_.reset(new ServiceDiscoveryDeviceLister(
         this, service_discovery_client_.get(), kCastServiceType));
     device_lister_->Start();
-    device_lister_->DiscoverNewDevices(true);
+    device_lister_->DiscoverNewDevices();
   }
 
   // ServiceDiscoveryDeviceLister::Delegate implementation: