Delegating the "are images allowed" decision to renderer.

chrome/common/content_settings.h

Index: chrome/common/content_settings.h
diff --git a/chrome/common/content_settings.h b/chrome/common/content_settings.h
index 4731263f7d15d5a891598d56bac153374421f53d..10a9f428ef032b8a4fad1431aff39e80ddd9d1a7 100644
--- a/chrome/common/content_settings.h
+++ b/chrome/common/content_settings.h
@@ -6,6 +6,10 @@
 #define CHROME_COMMON_CONTENT_SETTINGS_H_
 #pragma once
 
+#include <string>
+#include <vector>
+
+#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
@@ -38,4 +42,20 @@ struct ContentSettings {
   ContentSetting settings[CONTENT_SETTINGS_NUM_TYPES];
 };
 
+struct ContentSettingPatternSource {
+  ContentSettingPatternSource(const ContentSettingsPattern& primary_pattern,
+                              const ContentSettingsPattern& secondary_patttern,
+                              ContentSetting setting,
+                              const std::string& source,
+                              bool incognito);
+  ContentSettingPatternSource();
+  ContentSettingsPattern primary_pattern;
+  ContentSettingsPattern secondary_pattern;
+  ContentSetting setting;
+  std::string source;
+  bool incognito;
+};
+
+typedef std::vector<ContentSettingPatternSource> ContentSettingsForOneType;
+
 #endif  // CHROME_COMMON_CONTENT_SETTINGS_H_