Allow script to request durable storage permission (chrome side)

components/content_settings/core/browser/cookie_settings.h

Index: components/content_settings/core/browser/cookie_settings.h
diff --git a/components/content_settings/core/browser/cookie_settings.h b/components/content_settings/core/browser/cookie_settings.h
index 063e7e603f10fe449dcfa665279adf3dd6c3d597..5011f1b737f0d003c2f5718e28b6c1e75e41b7c9 100644
--- a/components/content_settings/core/browser/cookie_settings.h
+++ b/components/content_settings/core/browser/cookie_settings.h
@@ -90,6 +90,8 @@ class CookieSettings : public RefcountedKeyedService {
   void ResetCookieSetting(const ContentSettingsPattern& primary_pattern,
                           const ContentSettingsPattern& secondary_pattern);
 
+  void GetDurableSettings(ContentSettingsForOneType* settings) const;

[mlamouri (slow - plz ping), 2015/07/02 09:53:01]

Why do we need that?

[dgrogan, 2015/07/07 04:15:11]

It's called by chrome/browser/extensions/extension_special_storage_policy.cc,
which is consulted by the quota logic to see if an origin should be exempt from
eviction.

Is there a better way?

+
   // Detaches the |CookieSettings| from |PrefService|. This methods needs to be
   // called before destroying the service. Afterwards, only const methods can be
   // called.