Service Workers: Allow empty string as cache name

content/browser/service_worker/service_worker_cache_storage.cc

Index: content/browser/service_worker/service_worker_cache_storage.cc
diff --git a/content/browser/service_worker/service_worker_cache_storage.cc b/content/browser/service_worker/service_worker_cache_storage.cc
index 5409289e81f73ba5d825b5e45f869a28d2c24ab5..23d4e1d6c40af9f54d2ad34d2bfdb3476739be24 100644
--- a/content/browser/service_worker/service_worker_cache_storage.cc
+++ b/content/browser/service_worker/service_worker_cache_storage.cc
@@ -405,11 +405,6 @@ void ServiceWorkerCacheStorage::CreateCache(
     return;
   }
 
-  if (cache_name.empty()) {
-    callback.Run(kInvalidCacheID, CACHE_STORAGE_ERROR_EMPTY_KEY);
-    return;
-  }
-
   if (GetLoadedCache(cache_name)) {
     callback.Run(kInvalidCacheID, CACHE_STORAGE_ERROR_EXISTS);
     return;
@@ -436,11 +431,6 @@ void ServiceWorkerCacheStorage::GetCache(
     return;
   }
 
-  if (cache_name.empty()) {
-    callback.Run(kInvalidCacheID, CACHE_STORAGE_ERROR_EMPTY_KEY);
-    return;
-  }
-
   CacheContext* cache_context = GetLoadedCache(cache_name);
   if (!cache_context) {
     callback.Run(kInvalidCacheID, CACHE_STORAGE_ERROR_NOT_FOUND);
@@ -471,11 +461,6 @@ void ServiceWorkerCacheStorage::HasCache(const std::string& cache_name,
     return;
   }
 
-  if (cache_name.empty()) {
-    callback.Run(false, CACHE_STORAGE_ERROR_EMPTY_KEY);
-    return;
-  }
-
   bool has_cache = GetLoadedCache(cache_name) != NULL;
 
   callback.Run(has_cache, CACHE_STORAGE_ERROR_NO_ERROR);
@@ -494,11 +479,6 @@ void ServiceWorkerCacheStorage::DeleteCache(
     return;
   }
 
-  if (cache_name.empty()) {
-    callback.Run(false, CACHE_STORAGE_ERROR_EMPTY_KEY);
-    return;
-  }
-
   scoped_ptr<CacheContext> cache_context(GetLoadedCache(cache_name));
   if (!cache_context) {
     callback.Run(false, CACHE_STORAGE_ERROR_NOT_FOUND);