Introduce a content settings provider interface.

chrome/browser/content_settings/mock_content_settings_provider.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 "chrome/browser/content_settings/mock_content_settings_provider.h"
+
+MockContentSettingsProvider::MockContentSettingsProvider(
+    ContentSettingsType content_type,
+    ContentSetting setting,
+    bool is_managed,
+    bool can_override)
+    : content_type_(content_type),
+      setting_(setting),
+      is_managed_(is_managed),
+      can_override_(can_override) {
+}
+
+MockContentSettingsProvider::~MockContentSettingsProvider() {
+}
+
+bool MockContentSettingsProvider::CanProvideDefaultSetting(
+    ContentSettingsType content_type) {
+  return content_type == content_type_;
+}
+
+ContentSetting MockContentSettingsProvider::ProvideDefaultSetting(
+    ContentSettingsType content_type) {
+  return content_type == content_type_ ? setting_ : CONTENT_SETTING_DEFAULT;
+}
+
+void MockContentSettingsProvider::UpdateDefaultSetting(
+    ContentSettingsType content_type,
+    ContentSetting setting) {
+  if (can_override_ && content_type == content_type_)
+    setting_ = setting;
+}
+
+bool MockContentSettingsProvider::DefaultSettingIsManaged(
+    ContentSettingsType content_type) {
+  return content_type == content_type_ && is_managed_;
+}