[CacheStorage] Give cache directories unique names

content/browser/cache_storage/cache_storage_manager.h

Index: content/browser/cache_storage/cache_storage_manager.h
diff --git a/content/browser/cache_storage/cache_storage_manager.h b/content/browser/cache_storage/cache_storage_manager.h
index 63a255bd785c618e9ce7fb04ac5cc223a5862c21..525bfcc069a1e07bab8fdf3a897d98aa547d44cc 100644
--- a/content/browser/cache_storage/cache_storage_manager.h
+++ b/content/browser/cache_storage/cache_storage_manager.h
@@ -31,6 +31,7 @@ class QuotaManagerProxy;
 namespace content {
 
 class CacheStorageQuotaClient;
+class LegacyCacheDirectoryNameTest;
 
 // Keeps track of a CacheStorage per origin. There is one
 // CacheStorageManager per ServiceWorkerContextCore.
@@ -88,6 +89,7 @@ class CONTENT_EXPORT CacheStorageManager {
   friend class CacheStorageManagerTest;
   friend class CacheStorageMigrationTest;
   friend class CacheStorageQuotaClient;
+  friend class LegacyCacheDirectoryNameTest;
 
   typedef std::map<GURL, CacheStorage*> CacheStorageMap;