Fix clang warning in test_process_killer_win.cc re taking address of temporary.

base/test/test_process_killer_win.cc

Index: base/test/test_process_killer_win.cc
diff --git a/base/test/test_process_killer_win.cc b/base/test/test_process_killer_win.cc
index bc6e17ef436a2259e463834a87a29c58dad29440..df8d44e8399a740d9e284b1267b555eacc3331bd 100644
--- a/base/test/test_process_killer_win.cc
+++ b/base/test/test_process_killer_win.cc
@@ -159,7 +159,8 @@ namespace base {
 
 bool KillAllNamedProcessesWithArgument(const string16& process_name,
                                        const string16& argument) {
-  return base::KillProcesses(process_name, 0, &ArgumentFilter(argument));
+  ArgumentFilter argument_filter(argument);
+  return base::KillProcesses(process_name, 0, &argument_filter);
 }
 
 }  // namespace base