Allow script to request durable storage permission (chrome side)

content/public/test/mock_special_storage_policy.h

 // Copyright 2014 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.
 
 #ifndef CONTENT_PUBLIC_TEST_MOCK_SPECIAL_STORAGE_POLICY_H_
 #define CONTENT_PUBLIC_TEST_MOCK_SPECIAL_STORAGE_POLICY_H_
 
 #include <set>
 #include <string>
 
 #include "storage/browser/quota/special_storage_policy.h"
 #include "url/gurl.h"
 
 using storage::SpecialStoragePolicy;
 
 namespace content {
 
 class MockSpecialStoragePolicy : public storage::SpecialStoragePolicy {
  public:
   MockSpecialStoragePolicy();
 
   bool IsStorageProtected(const GURL& origin) override;
   bool IsStorageUnlimited(const GURL& origin) override;
   bool IsStorageSessionOnly(const GURL& origin) override;
   bool CanQueryDiskSize(const GURL& origin) override;
   bool HasIsolatedStorage(const GURL& origin) override;
   bool HasSessionOnlyOrigins() override;
+  bool IsStorageDurable(const GURL& origin) override;
 
   void AddProtected(const GURL& origin) {
     protected_.insert(origin);
   }
 
   void AddUnlimited(const GURL& origin) {
     unlimited_.insert(origin);
   }
 
   void RemoveUnlimited(const GURL& origin) {
@@ skipping 51 matching lines @@
   std::set<GURL> session_only_;
   std::set<GURL> can_query_disk_size_;
   std::set<GURL> isolated_;
   std::set<std::string> file_handlers_;
 
   bool all_unlimited_;
 };
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_MOCK_SPECIAL_STORAGE_POLICY_H_