Replace FOR_EACH_OBSERVER in chromeos/ with range-based for

chromeos/dbus/fake_shill_manager_client.cc

Index: chromeos/dbus/fake_shill_manager_client.cc
diff --git a/chromeos/dbus/fake_shill_manager_client.cc b/chromeos/dbus/fake_shill_manager_client.cc
index 047c4f1ac10b0f93815e437ae287e68c0cbcad24..b55be92dac872df264254b7108a820b88e161763 100644
--- a/chromeos/dbus/fake_shill_manager_client.cc
+++ b/chromeos/dbus/fake_shill_manager_client.cc
@@ -966,14 +966,12 @@ void FakeShillManagerClient::NotifyObserversPropertyChanged(
   }
   if (property == shill::kServiceCompleteListProperty) {
     std::unique_ptr<base::ListValue> services(GetEnabledServiceList(property));
-    FOR_EACH_OBSERVER(ShillPropertyChangedObserver,
-                      observer_list_,
-                      OnPropertyChanged(property, *(services.get())));
+    for (auto& observer : observer_list_)
+      observer.OnPropertyChanged(property, *(services.get()));
     return;
   }
-  FOR_EACH_OBSERVER(ShillPropertyChangedObserver,
-                    observer_list_,
-                    OnPropertyChanged(property, *value));
+  for (auto& observer : observer_list_)
+    observer.OnPropertyChanged(property, *value);
 }
 
 base::ListValue* FakeShillManagerClient::GetListProperty(