Make quota logic obey durable storage permission

content/public/test/mock_special_storage_policy.cc

Index: content/public/test/mock_special_storage_policy.cc
diff --git a/content/public/test/mock_special_storage_policy.cc b/content/public/test/mock_special_storage_policy.cc
index ff3c6c44be160d8638d2167d96a8b2d2aae25c7e..08475360293d178a9fc83461aa0f665624247323 100644
--- a/content/public/test/mock_special_storage_policy.cc
+++ b/content/public/test/mock_special_storage_policy.cc
@@ -38,6 +38,10 @@ bool MockSpecialStoragePolicy::HasSessionOnlyOrigins() {
   return !session_only_.empty();
 }
 
+bool MockSpecialStoragePolicy::IsStorageDurable(const GURL& origin) {
+  return ContainsKey(durable_, origin);
+}
+
 MockSpecialStoragePolicy::~MockSpecialStoragePolicy() {}
 
 }  // namespace content