Change preference APIs to take std::string instead of const char*.

base/prefs/pref_change_registrar_unittest.cc

 // Copyright (c) 2010 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 "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/prefs/pref_change_registrar.h"
 #include "base/prefs/pref_observer.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/testing_pref_service.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using testing::Mock;
 using testing::Eq;
 
 namespace base {
 namespace {
 
 const char kHomePage[] = "homepage";
 const char kHomePageIsNewTabPage[] = "homepage_is_newtabpage";
 const char kApplicationLocale[] = "intl.app_locale";
 
 // A mock provider that allows us to capture pref observer changes.
 class MockPrefService : public TestingPrefServiceSimple {
  public:
   MockPrefService() {}
   virtual ~MockPrefService() {}
 
-  MOCK_METHOD2(AddPrefObserver,
-               void(const char*, PrefObserver*));
-  MOCK_METHOD2(RemovePrefObserver,
-               void(const char*, PrefObserver*));
+  MOCK_METHOD2(AddPrefObserver, void(const std::string&, PrefObserver*));
+  MOCK_METHOD2(RemovePrefObserver, void(const std::string&, PrefObserver*));
 };
 
 }  // namespace
 
 class PrefChangeRegistrarTest : public testing::Test {
  public:
   PrefChangeRegistrarTest() {}
   virtual ~PrefChangeRegistrarTest() {}
 
  protected:
@@ skipping 147 matching lines @@
   pref_service_->SetUserPref(kHomePageIsNewTabPage,
                              new FundamentalValue(true));
   Mock::VerifyAndClearExpectations(this);
 
   EXPECT_CALL(*this, OnPreferenceChanged(_)).Times(0);
   pref_service_->SetUserPref(kApplicationLocale, new StringValue("en_US.utf8"));
   Mock::VerifyAndClearExpectations(this);
 }
 
 }  // namespace base