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

chrome/browser/content_settings/content_settings_provider.h

Index: chrome/browser/content_settings/content_settings_provider.h
diff --git a/chrome/browser/content_settings/content_settings_provider.h b/chrome/browser/content_settings/content_settings_provider.h
index 8065dbefb96c3f948615ceed047a35fb40cda34a..d4726cb9bb7e3393c58431af8753dcb1b3e83aa2 100644
--- a/chrome/browser/content_settings/content_settings_provider.h
+++ b/chrome/browser/content_settings/content_settings_provider.h
@@ -13,6 +13,7 @@
 #include <string>
 #include <vector>
 
+#include "base/values.h"
 #include "chrome/browser/content_settings/content_settings_pattern.h"
 #include "chrome/common/content_settings.h"
 
@@ -75,6 +76,21 @@ class ProviderInterface {
       ContentSettingsType content_type,
       const ResourceIdentifier& resource_identifier) const = 0;
 
+  // Returns the content setting |Value| for the given |content_type| which
+  // applies to the given |primary_url|, |secondary_url| pair. The ownership of
+  // the returned |Value| pointer is transfered to the caller. If no content
+  // settings value is available for the given parameter then NULL is returned.

[wtc, 2011/09/01 18:21:09]

Nit: perhaps "parameter" should be "parameters" (plural) because
the method has four parameters?  Or are you referring to a
particular parameter?  If so, please name it.

[markusheintz_, 2011/09/02 15:22:21]

Done.

+  // For ContentSettingsTypes that require a resource identifier to be
+  // specified, the |resource_identifier| must be non-empty.
+  //
+  // This may be called on any thread.
+  virtual Value* GetContentSettingValue(
+      const GURL& primary_url,
+      const GURL& secondary_url,
+      ContentSettingsType content_type,
+      const ResourceIdentifier& resource_identifier) const = 0;
+
+
   // Sets the content setting for a particular |primary_pattern|,
   // |secondary_pattern|, |content_type| tuple. For ContentSettingsTypes that
   // require a resource identifier to be specified, the |resource_identifier|