Implement preference and policy based content settings providers.

chrome/browser/content_settings/mock_content_settings_provider.cc

Index: chrome/browser/content_settings/mock_content_settings_provider.cc
diff --git a/chrome/browser/content_settings/mock_content_settings_provider.cc b/chrome/browser/content_settings/mock_content_settings_provider.cc
index f93f7cef1568cbb0c5e2ba04089e17c5f03c6d85..ee3e845037ceee68cd1154b07cd6c3b6a07b2d4f 100644
--- a/chrome/browser/content_settings/mock_content_settings_provider.cc
+++ b/chrome/browser/content_settings/mock_content_settings_provider.cc
@@ -19,12 +19,12 @@ MockContentSettingsProvider::~MockContentSettingsProvider() {
 }
 
 bool MockContentSettingsProvider::CanProvideDefaultSetting(
-    ContentSettingsType content_type) {
+    ContentSettingsType content_type) const {
   return content_type == content_type_;
 }
 
 ContentSetting MockContentSettingsProvider::ProvideDefaultSetting(
-    ContentSettingsType content_type) {
+    ContentSettingsType content_type) const {
   return content_type == content_type_ ? setting_ : CONTENT_SETTING_DEFAULT;
 }
 
@@ -36,6 +36,9 @@ void MockContentSettingsProvider::UpdateDefaultSetting(
 }
 
 bool MockContentSettingsProvider::DefaultSettingIsManaged(
-    ContentSettingsType content_type) {
+    ContentSettingsType content_type) const {
   return content_type == content_type_ && is_managed_;
 }
+
+void MockContentSettingsProvider::ResetToDefaults() {
+}