ServiceWorker: Support longest-prefix-match for registration scope

content/browser/service_worker/service_worker_utils.h

Index: content/browser/service_worker/service_worker_utils.h
diff --git a/content/browser/service_worker/service_worker_utils.h b/content/browser/service_worker/service_worker_utils.h
index 38669c4317648145870670961284df7a64f50aed..66ee9b2e1985d17ac025d1798fb159a4c39d0019 100644
--- a/content/browser/service_worker/service_worker_utils.h
+++ b/content/browser/service_worker/service_worker_utils.h
@@ -31,6 +31,11 @@ class ServiceWorkerUtils {
 
   // 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