Remove the migration code from content_settings::DefaultProvider.

chrome/browser/content_settings/host_content_settings_map_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 "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/message_loop/message_loop.h"
 #include "base/prefs/pref_service.h"
@@ skipping 307 matching lines @@
   host_content_settings_map->SetDefaultContentSetting(
       CONTENT_SETTINGS_TYPE_IMAGES, CONTENT_SETTING_BLOCK);
 }
 
 TEST_F(HostContentSettingsMapTest, ObserveDefaultPref) {
   TestingProfile profile;
   HostContentSettingsMap* host_content_settings_map =
       profile.GetHostContentSettingsMap();
 
   PrefService* prefs = profile.GetPrefs();
-
-  // Make a copy of the default pref value so we can reset it later.
-  scoped_ptr<base::Value> default_value(prefs->FindPreference(
-      prefs::kDefaultContentSettings)->GetValue()->DeepCopy());
-
   GURL host("http://example.com");
 
   host_content_settings_map->SetDefaultContentSetting(
       CONTENT_SETTINGS_TYPE_IMAGES, CONTENT_SETTING_BLOCK);
   EXPECT_EQ(CONTENT_SETTING_BLOCK,
             host_content_settings_map->GetContentSetting(
                 host, host, CONTENT_SETTINGS_TYPE_IMAGES, std::string()));
 
-  // Make a copy of the pref's new value so we can reset it later.
-  scoped_ptr<base::Value> new_value(prefs->FindPreference(
-      prefs::kDefaultContentSettings)->GetValue()->DeepCopy());
-
   // Clearing the backing pref should also clear the internal cache.
-  prefs->Set(prefs::kDefaultContentSettings, *default_value);
+  prefs->ClearPref(prefs::kDefaultImagesSetting);
   EXPECT_EQ(CONTENT_SETTING_ALLOW,
             host_content_settings_map->GetContentSetting(
                 host, host, CONTENT_SETTINGS_TYPE_IMAGES, std::string()));
 
   // Reseting the pref to its previous value should update the cache.
-  prefs->Set(prefs::kDefaultContentSettings, *new_value);
+  prefs->SetInteger(prefs::kDefaultImagesSetting, CONTENT_SETTING_BLOCK);
   EXPECT_EQ(CONTENT_SETTING_BLOCK,
             host_content_settings_map->GetContentSetting(
                 host, host, CONTENT_SETTINGS_TYPE_IMAGES, std::string()));
 }
 
 TEST_F(HostContentSettingsMapTest, ObserveExceptionPref) {
   TestingProfile profile;
   HostContentSettingsMap* host_content_settings_map =
       profile.GetHostContentSettingsMap();
 
@@ skipping 653 matching lines @@
   EXPECT_EQ(CONTENT_SETTING_ALLOW,
             host_content_settings_map->GetContentSetting(
                 host, host, CONTENT_SETTINGS_TYPE_IMAGES, std::string()));
   host_content_settings_map->SetContentSetting(
       pattern,
       ContentSettingsPattern::Wildcard(),
       CONTENT_SETTINGS_TYPE_IMAGES,
       std::string(),
       CONTENT_SETTING_DEFAULT);
 }