Add ContentSettingsProvider Interface.

chrome/browser/content_settings/content_settings_rule.h

Index: chrome/browser/content_settings/content_settings_rule.h
diff --git a/chrome/browser/content_settings/content_settings_rule.h b/chrome/browser/content_settings/content_settings_rule.h
new file mode 100644
index 0000000000000000000000000000000000000000..7e4afc297b70b6e0cbdc4662fc9e567b0a660ec3
--- /dev/null
+++ b/chrome/browser/content_settings/content_settings_rule.h
@@ -0,0 +1,55 @@
+// Copyright (c) 2011 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.
+
+#ifndef CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_RULE_H_
+#define CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_RULE_H_
+#pragma once
+
+#include <vector>
+
+#include "base/linked_ptr.h"
+#include "chrome/browser/content_settings/host.h"
+#include "chrome/browser/content_settings/host_pattern.h"
+#include "chrome/common/content_settings.h"
+
+namespace content_settings {
+
+class ContentSettingsRule {
+ public:
+  ContentSettingsRule(
+      const HostPattern& host_pattern,
+      const ContentSetting& setting) :
+          host_pattern_(host_pattern),
+          content_setting_(setting) {}
+
+  const HostPattern& host_pattern() const {
+    return host_pattern_;
+  }
+
+  const ContentSetting& content_setting() const {
+    return content_setting_;
+  }
+
+  // Compare two rules. If the rules are not disjunct, i.e. if there is a Host
+  // matching both rules, the rule taking precedence should be the smaller one.
+  // Otherwise, any ordering may be returned, as long as it follows the rules
+  // for the < operator (like lexically comparing the |host_pattern_|.
+  bool operator<(const ContentSettingsRule& other) const {
+    // TODO(markusheintz): Implement
+    return false;
+  }
+
+ private:
+  const HostPattern host_pattern_;
+  const ContentSetting content_setting_;
+
+  DISALLOW_COPY_AND_ASSIGN(ContentSettingsRule);
+};
+
+typedef linked_ptr<ContentSettingsRule> ContentSettingsRulePtr;
+typedef std::vector<ContentSettingsRulePtr> ContentSettingsRules;
+
+}  // namespace content_settings
+
+#endif  // CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_RULE_H_