Add a method to the content_settings::ProviderInterface to return the content settings Value.

chrome/browser/content_settings/content_settings_extension_provider.h

Index: chrome/browser/content_settings/content_settings_extension_provider.h
diff --git a/chrome/browser/content_settings/content_settings_extension_provider.h b/chrome/browser/content_settings/content_settings_extension_provider.h
index f417fe0465aed2a9a2de3184e01f8d720d4f0b43..7032201b237704760fbb4140c711c2c9dfbb8b63 100644
--- a/chrome/browser/content_settings/content_settings_extension_provider.h
+++ b/chrome/browser/content_settings/content_settings_extension_provider.h
@@ -29,8 +29,14 @@ class ExtensionProvider : public ObservableProvider,
 
   // Provider Interface implementations.
   virtual ContentSetting GetContentSetting(
-      const GURL& embedded_url,
-      const GURL& top_level_url,
+      const GURL& primary_url,
+      const GURL& secondary_url,
+      ContentSettingsType content_type,
+      const ResourceIdentifier& resource_identifier) const;
+
+  virtual Value* GetContentSettingValue(
+      const GURL& primary_url,
+      const GURL& secondary_url,
       ContentSettingsType content_type,
       const ResourceIdentifier& resource_identifier) const;