Update base/timer.h code to pass through Location from call sites.

net/proxy/proxy_config_service_linux.cc

Index: net/proxy/proxy_config_service_linux.cc
diff --git a/net/proxy/proxy_config_service_linux.cc b/net/proxy/proxy_config_service_linux.cc
index 2e19589447e247e15e4a02845e35299bf5dc838b..ac707c7f709c66c3cf90acac8df73609cf128242 100644
--- a/net/proxy/proxy_config_service_linux.cc
+++ b/net/proxy/proxy_config_service_linux.cc
@@ -455,7 +455,7 @@ class SettingGetterImplGConf : public ProxyConfigServiceLinux::SettingGetter {
     debounce_timer_.Stop();
     debounce_timer_.Start(
         base::TimeDelta::FromMilliseconds(kDebounceTimeoutMilliseconds),
-        this, &SettingGetterImplGConf::OnDebouncedNotification);
+        this, &SettingGetterImplGConf::OnDebouncedNotification, FROM_HERE);
   }
 
   // gconf notification callback, dispatched on the default glib main loop.
@@ -783,7 +783,7 @@ GSettings* (*g_settings_new)(const gchar* schema);
     debounce_timer_.Stop();
     debounce_timer_.Start(
         base::TimeDelta::FromMilliseconds(kDebounceTimeoutMilliseconds),
-        this, &SettingGetterImplGSettings::OnDebouncedNotification);
+        this, &SettingGetterImplGSettings::OnDebouncedNotification, FROM_HERE);
   }
 
   // gsettings notification callback, dispatched on the default glib main loop.
@@ -1343,7 +1343,7 @@ class SettingGetterImplKDE : public ProxyConfigServiceLinux::SettingGetter,
       debounce_timer_.Stop();
       debounce_timer_.Start(base::TimeDelta::FromMilliseconds(
           kDebounceTimeoutMilliseconds), this,
-          &SettingGetterImplKDE::OnDebouncedNotification);
+          &SettingGetterImplKDE::OnDebouncedNotification, FROM_HERE);
     }
   }