Allow script to request durable storage permission (chrome side)

chrome/browser/extensions/extension_special_storage_policy.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/extension_special_storage_policy.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
@@ skipping 118 matching lines @@
       return true;
   }
   return false;
 }
 
 bool ExtensionSpecialStoragePolicy::HasIsolatedStorage(const GURL& origin) {
   base::AutoLock locker(lock_);
   return isolated_extensions_.Contains(origin);
 }
 
+bool ExtensionSpecialStoragePolicy::IsStorageDurable(const GURL& origin) {
+  ContentSettingsForOneType entries;
+  cookie_settings_->GetDurableSettings(&entries);
+  for (size_t i = 0; i < entries.size(); ++i) {
+    if (!entries[i].primary_pattern.Matches(origin))
+      continue;
+    // TODO(dgrogan): How should this use secondary_pattern?
+    return entries[i].setting == CONTENT_SETTING_ALLOW;
+  }
+  return false;
+}
+
 bool ExtensionSpecialStoragePolicy::NeedsProtection(
     const extensions::Extension* extension) {
   return extension->is_hosted_app() && !extension->from_bookmark();
 }
 
 const extensions::ExtensionSet*
 ExtensionSpecialStoragePolicy::ExtensionsProtectingOrigin(
     const GURL& origin) {
   base::AutoLock locker(lock_);
   return protected_apps_.ExtensionsContaining(origin);
@@ skipping 202 matching lines @@
 }
 
 void ExtensionSpecialStoragePolicy::SpecialCollection::Clear() {
   ClearCache();
   extensions_.Clear();
 }
 
 void ExtensionSpecialStoragePolicy::SpecialCollection::ClearCache() {
   STLDeleteValues(&cached_results_);
 }