Add ContentSettingsProvider Interface.

chrome/browser/content_settings/host_pattern.h

Index: chrome/browser/content_settings/host_pattern.h
diff --git a/chrome/browser/content_settings/host_pattern.h b/chrome/browser/content_settings/host_pattern.h
new file mode 100644
index 0000000000000000000000000000000000000000..0838a600a3af4deaf81490bfb969890249cfb0a9
--- /dev/null
+++ b/chrome/browser/content_settings/host_pattern.h
@@ -0,0 +1,42 @@
+// 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_HOST_PATTERN_H_
+#define CHROME_BROWSER_CONTENT_SETTINGS_HOST_PATTERN_H_
+#pragma once
+
+#include "chrome/browser/content_settings/content_settings_pattern.h"
+#include "chrome/browser/content_settings/host.h"
+
+namespace content_settings {
+
+class HostPattern {
+ public:
+  HostPattern(const ContentSettingsPattern& requesting_url_pattern,
+                         const ContentSettingsPattern& embedding_url_pattern) :
+    requesting_url_pattern_(requesting_url_pattern),
+    embedding_url_pattern_(embedding_url_pattern) {}
+
+  // Return true if the HostPattern matches the given |source|.
+  bool Matches(const Host& host) const {
+    return requesting_url_pattern_.Matches(host.requesting_url()) &&
+           embedding_url_pattern_.Matches(host.embedding_url());
+  }
+
+  const ContentSettingsPattern& requesting_url_pattern() {
+    return requesting_url_pattern_;
+  }
+
+  const ContentSettingsPattern& embedding_url_pattern() {
+    return embedding_url_pattern_;
+  }
+
+ private:
+  const ContentSettingsPattern requesting_url_pattern_;
+  const ContentSettingsPattern embedding_url_pattern_;
+};
+
+}  // namespace content_Settings
+
+#endif  // CHROME_BROWSER_CONTENT_SETTINGS_HOST_PATTERN_H_