Introduce incognito preference settings.

chrome/browser/sync/glue/preference_model_associator_unittest.cc

Index: chrome/browser/sync/glue/preference_model_associator_unittest.cc
diff --git a/chrome/browser/sync/glue/preference_model_associator_unittest.cc b/chrome/browser/sync/glue/preference_model_associator_unittest.cc
index b3dca08f300b1e1120b277bfc95c73d592ff3c13..d1ab1e4ee7f11f9a33be5797903fa2635403de6d 100644
--- a/chrome/browser/sync/glue/preference_model_associator_unittest.cc
+++ b/chrome/browser/sync/glue/preference_model_associator_unittest.cc
@@ -34,11 +34,6 @@ class AbstractPreferenceMergeTest : public testing::Test {
         Value::CreateIntegerValue(setting));
   }
 
-  void SetPrefToNull(const std::string& pref_name) {
-    scoped_ptr<Value> null_value(Value::CreateNullValue());
-    pref_service_->Set(pref_name.c_str(), *null_value);
-  }
-
   void SetPrefToEmpty(const std::string& pref_name) {
     scoped_ptr<Value> empty_value;
     const PrefService::Preference* pref =
@@ -89,15 +84,6 @@ TEST_F(ListPreferenceMergeTest, NotListOrDictionary) {
   EXPECT_TRUE(merged_value->Equals(server_value.get()));
 }
 
-TEST_F(ListPreferenceMergeTest, LocalNull) {
-  SetPrefToNull(prefs::kURLsToRestoreOnStartup);
-  const PrefService::Preference* pref =
-      pref_service_->FindPreference(prefs::kURLsToRestoreOnStartup);
-  scoped_ptr<Value> merged_value(
-      PreferenceModelAssociator::MergePreference(*pref, server_url_list_));
-  EXPECT_TRUE(merged_value->Equals(&server_url_list_));
-}
-
 TEST_F(ListPreferenceMergeTest, LocalEmpty) {
   SetPrefToEmpty(prefs::kURLsToRestoreOnStartup);
   const PrefService::Preference* pref =
@@ -133,16 +119,6 @@ TEST_F(ListPreferenceMergeTest, ServerEmpty) {
   EXPECT_TRUE(merged_value->Equals(local_list_value));
 }
 
-TEST_F(ListPreferenceMergeTest, BothNull) {
-  SetPrefToNull(prefs::kURLsToRestoreOnStartup);
-  scoped_ptr<Value> null_value(Value::CreateNullValue());
-  const PrefService::Preference* pref =
-      pref_service_->FindPreference(prefs::kURLsToRestoreOnStartup);
-  scoped_ptr<Value> merged_value(
-      PreferenceModelAssociator::MergePreference(*pref, *null_value));
-  EXPECT_TRUE(merged_value->Equals(null_value.get()));
-}
-
 TEST_F(ListPreferenceMergeTest, Merge) {
   ListValue* local_list_value =
       pref_service_->GetMutableList(prefs::kURLsToRestoreOnStartup);
@@ -219,15 +195,6 @@ class DictionaryPreferenceMergeTest : public AbstractPreferenceMergeTest {
   DictionaryValue server_patterns_;
 };
 
-TEST_F(DictionaryPreferenceMergeTest, LocalNull) {
-  SetPrefToNull(prefs::kContentSettingsPatterns);
-  const PrefService::Preference* pref =
-      pref_service_->FindPreference(prefs::kURLsToRestoreOnStartup);
-  scoped_ptr<Value> merged_value(
-      PreferenceModelAssociator::MergePreference(*pref, server_patterns_));
-  EXPECT_TRUE(merged_value->Equals(&server_patterns_));
-}
-
 TEST_F(DictionaryPreferenceMergeTest, LocalEmpty) {
   SetPrefToEmpty(prefs::kContentSettingsPatterns);
   const PrefService::Preference* pref =
@@ -263,16 +230,6 @@ TEST_F(DictionaryPreferenceMergeTest, ServerEmpty) {
   EXPECT_TRUE(merged_value->Equals(local_dict_value));
 }
 
-TEST_F(DictionaryPreferenceMergeTest, BothNull) {
-  scoped_ptr<Value> null_value(Value::CreateNullValue());
-  SetPrefToNull(prefs::kContentSettingsPatterns);
-  const PrefService::Preference* pref =
-      pref_service_->FindPreference(prefs::kContentSettingsPatterns);
-  scoped_ptr<Value> merged_value(
-      PreferenceModelAssociator::MergePreference(*pref, *null_value));
-  EXPECT_TRUE(merged_value->Equals(null_value.get()));
-}
-
 TEST_F(DictionaryPreferenceMergeTest, MergeNoConflicts) {
   DictionaryValue* local_dict_value =
       pref_service_->GetMutableDictionary(prefs::kContentSettingsPatterns);