Introduce incognito preference settings.

chrome/browser/search_engines/template_url_prepopulate_data_unittest.cc

Index: chrome/browser/search_engines/template_url_prepopulate_data_unittest.cc
diff --git a/chrome/browser/search_engines/template_url_prepopulate_data_unittest.cc b/chrome/browser/search_engines/template_url_prepopulate_data_unittest.cc
index f79f6b67c9a4a42b3d44cea51d0fa66b049c43a3..4f0120aa72870fc296cc41b4f8f69d7c52077561 100644
--- a/chrome/browser/search_engines/template_url_prepopulate_data_unittest.cc
+++ b/chrome/browser/search_engines/template_url_prepopulate_data_unittest.cc
@@ -91,10 +91,11 @@ TEST_F(TemplateURLPrepopulateDataTest, UniqueIDs) {
 // Verifies that default search providers from the preferences file
 // override the built-in ones.
 TEST_F(TemplateURLPrepopulateDataTest, ProvidersFromPrefs) {
-  TestingPrefService prefs;
-  TemplateURLPrepopulateData::RegisterUserPrefs(&prefs);
-  prefs.SetUserPref(prefs::kSearchProviderOverridesVersion,
-                    Value::CreateIntegerValue(1));
+  scoped_ptr<TestingPrefService> prefs(
+      TestingPrefService::CreateTestingPrefService());
+  TemplateURLPrepopulateData::RegisterUserPrefs(prefs.get());
+  prefs->SetUserPref(prefs::kSearchProviderOverridesVersion,
+                     Value::CreateIntegerValue(1));
   ListValue* overrides = new ListValue;
   DictionaryValue* entry = new DictionaryValue;
   entry->SetString("name", "foo");
@@ -108,15 +109,15 @@ TEST_F(TemplateURLPrepopulateDataTest, ProvidersFromPrefs) {
   entry->SetInteger("logo_id", 0);
   entry->SetInteger("id", 1001);
   overrides->Append(entry);
-  prefs.SetUserPref(prefs::kSearchProviderOverrides, overrides);
+  prefs->SetUserPref(prefs::kSearchProviderOverrides, overrides);
 
-  int version = TemplateURLPrepopulateData::GetDataVersion(&prefs);
+  int version = TemplateURLPrepopulateData::GetDataVersion(prefs.get());
   EXPECT_EQ(1, version);
 
   ScopedVector<TemplateURL> t_urls;
   size_t default_index;
   TemplateURLPrepopulateData::GetPrepopulatedEngines(
-      &prefs, &(t_urls.get()), &default_index);
+      prefs.get(), &(t_urls.get()), &default_index);
 
   ASSERT_EQ(1u, t_urls.size());
   EXPECT_EQ(L"foo", t_urls[0]->short_name());