QuotaManager: Return the remaining free disk space as quota.

webkit/quota/mock_special_storage_policy.cc

Index: webkit/quota/mock_special_storage_policy.cc
diff --git a/webkit/quota/mock_special_storage_policy.cc b/webkit/quota/mock_special_storage_policy.cc
index b8203a378b66ea6949caec3c640e6f3a049fcb6b..340e169e90c6ff45909b76a5c8e7c2ad3ba57b92 100644
--- a/webkit/quota/mock_special_storage_policy.cc
+++ b/webkit/quota/mock_special_storage_policy.cc
@@ -24,6 +24,10 @@ bool MockSpecialStoragePolicy::IsStorageSessionOnly(const GURL& origin) {
   return session_only_.find(origin) != session_only_.end();
 }
 
+bool MockSpecialStoragePolicy::IsInstalledApp(const GURL& origin) {
+  return installed_.find(origin) != installed_.end();
+}
+
 bool MockSpecialStoragePolicy::IsFileHandler(const std::string& extension_id) {
   return file_handlers_.find(extension_id) != file_handlers_.end();
 }