Delegating the "are images allowed" decision to renderer.

chrome/common/content_settings.cc

Index: chrome/common/content_settings.cc
diff --git a/chrome/common/content_settings.cc b/chrome/common/content_settings.cc
index 89eaa591f102f9eacbba434582d162799da6d31c..3bb67f8d40eb3cb0fde087b3fef807fc5a7768e7 100644
--- a/chrome/common/content_settings.cc
+++ b/chrome/common/content_settings.cc
@@ -9,3 +9,17 @@ ContentSetting IntToContentSetting(int content_setting) {
           (content_setting >= CONTENT_SETTING_NUM_SETTINGS)) ?
       CONTENT_SETTING_DEFAULT : static_cast<ContentSetting>(content_setting);
 }
+
+ContentSettingPatternSource::ContentSettingPatternSource(
+    const ContentSettingsPattern& primary_pattern,
+    const ContentSettingsPattern& secondary_pattern,
+    ContentSetting setting,
+    const std::string& source,
+    bool incognito)
+    : primary_pattern(primary_pattern),
+      secondary_pattern(secondary_pattern),
+      setting(setting),
+      source(source),
+      incognito(incognito) {}
+
+ContentSettingPatternSource::ContentSettingPatternSource() {}