Delegating the "are images allowed" decision to renderer.

chrome/common/content_settings.h

 // 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.
 
 #ifndef CHROME_COMMON_CONTENT_SETTINGS_H_
 #define CHROME_COMMON_CONTENT_SETTINGS_H_
 #pragma once
 
+#include <string>
+#include <vector>
+
+#include "base/tuple.h"
+#include "chrome/common/content_settings_pattern.h"
 #include "chrome/common/content_settings_types.h"
 
 // Different settings that can be assigned for a particular content type.  We
 // give the user the ability to set these on a global and per-host basis.
 enum ContentSetting {
   CONTENT_SETTING_DEFAULT = 0,
   CONTENT_SETTING_ALLOW,
   CONTENT_SETTING_BLOCK,
   CONTENT_SETTING_ASK,
   CONTENT_SETTING_SESSION_ONLY,
@@ skipping 12 matching lines @@
   }
 
   explicit ContentSettings(ContentSetting default_setting) {
     for (int i = 0; i < CONTENT_SETTINGS_NUM_TYPES; ++i)
       settings[i] = default_setting;
   }
 
   ContentSetting settings[CONTENT_SETTINGS_NUM_TYPES];
 };
 
+// For transmitting content settings over IPC.
+typedef Tuple3<ContentSettingsPattern,
+               ContentSettingsPattern,
+               ContentSetting> ContentSettingPatternTuple;
+
+typedef std::vector<ContentSettingPatternTuple> ContentSettingRules;
+
 #endif  // CHROME_COMMON_CONTENT_SETTINGS_H_