ServiceWorker: Scope should match url in longest-prefix-match way (won't commit)

content/browser/service_worker/service_worker_utils.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_BROWSER_SERVICE_WORKER_SERVICE_WORKER_UTILS_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_UTILS_H_
 
+#include <vector>
+
 #include "content/common/content_export.h"
 #include "content/common/service_worker/service_worker_status_code.h"
 #include "webkit/common/resource_type.h"
 
+class GURL;
+
 namespace content {
 
 class ServiceWorkerUtils {
  public:
   static bool IsMainResourceType(ResourceType::Type type) {
     return ResourceType::IsFrame(type) ||
            ResourceType::IsSharedWorker(type);
   }
 
   static bool IsServiceWorkerResourceType(ResourceType::Type type) {
     return ResourceType::IsServiceWorker(type);
   }
 
   // Returns true if the feature is enabled (or not disabled) by command-line
   // flag.
   static bool IsFeatureEnabled();
 
   // A helper for creating a do-nothing status callback.
   static void NoOpStatusCallback(ServiceWorkerStatusCode status) {}
 
   // Returns true if |scope| matches |url|.
   CONTENT_EXPORT static bool ScopeMatches(const GURL& scope, const GURL& url);
+
+  // Finds a scope that matches |url| longest from |scopes|. Returns true and
+  // fills |pos| with a position of the scope in |scopes| if it's found.
+  CONTENT_EXPORT static bool FindLongestScopeMatch(
+      const std::vector<GURL>& scopes, const GURL& url, size_t* pos);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_UTILS_H_