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..25700dee2bd744864a56a6ae1e3e57166d39b96b 100644
--- a/content/browser/service_worker/service_worker_utils.h
+++ b/content/browser/service_worker/service_worker_utils.h
@@ -9,6 +9,8 @@
 #include "content/common/service_worker/service_worker_status_code.h"
 #include "webkit/common/resource_type.h"
 
+class GURL;
+
 namespace content {
 
 class ServiceWorkerUtils {
@@ -33,6 +35,21 @@ class ServiceWorkerUtils {
   CONTENT_EXPORT static bool ScopeMatches(const GURL& scope, const GURL& url);
 };
 
+class CONTENT_EXPORT LongestScopeMatcher {
+ public:
+  explicit LongestScopeMatcher(const GURL& url) : url_(url) {}
+  virtual ~LongestScopeMatcher() {}
+
+  // Returns true if |scope| matches |url_| longer than |match_|.
+  bool MatchLongest(const GURL& scope);
+
+ private:
+  const GURL url_;
+  GURL match_;
+
+  DISALLOW_COPY_AND_ASSIGN(LongestScopeMatcher);
+};
+
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_UTILS_H_