Removed unnecessary returning by reference.

chrome/service/service_process_prefs_unittest.cc

 // Copyright (c) 2012 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 <string>
 
 #include "base/message_loop.h"
 #include "base/message_loop_proxy.h"
 #include "base/scoped_temp_dir.h"
 #include "chrome/service/service_process_prefs.h"
@@ skipping 22 matching lines @@
 
 // Test ability to retrieve prefs
 TEST_F(ServiceProcessPrefsTest, RetrievePrefs) {
   prefs_->SetBoolean("testb", true);
   prefs_->SetString("tests", "testvalue");
   prefs_->WritePrefs();
   MessageLoop::current()->RunAllPending();
   prefs_->SetBoolean("testb", false);   // overwrite
   prefs_->SetString("tests", "");   // overwrite
   prefs_->ReadPrefs();
-  bool testb;
-  prefs_->GetBoolean("testb", &testb);
-  EXPECT_EQ(testb, true);
-  std::string tests;
-  prefs_->GetString("tests", &tests);
-  EXPECT_EQ(tests, "testvalue");
+  EXPECT_EQ(prefs_->GetBoolean("testb", false), true);
+  EXPECT_EQ(prefs_->GetString("tests", ""), "testvalue");
 }