refer to WebServiceWorkerCacheError values in c++03 style

Source/modules/serviceworkers/CacheStorage.cpp

 // 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.
 
 #include "config.h"
 #include "modules/serviceworkers/CacheStorage.h"
 
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "modules/serviceworkers/Cache.h"
 #include "public/platform/WebServiceWorkerCacheError.h"
 #include "public/platform/WebServiceWorkerCacheStorage.h"
 
 namespace blink {
 
 namespace {
 
 const char* CacheErrorToString(WebServiceWorkerCacheError reason)
 {
     // FIXME: Construct correct DOM error objects rather than returning strings.
     switch (reason) {
-    case WebServiceWorkerCacheError::WebServiceWorkerCacheErrorNotImplemented:
+    case WebServiceWorkerCacheErrorNotImplemented:
         return "not implemented";
-    case WebServiceWorkerCacheError::WebServiceWorkerCacheErrorNotFound:
+    case WebServiceWorkerCacheErrorNotFound:
         return "not found";
-    case WebServiceWorkerCacheError::WebServiceWorkerCacheErrorExists:
+    case WebServiceWorkerCacheErrorExists:
         return "entry already exists";
     default:
         ASSERT_NOT_REACHED();
         return "unknown error";
     }
 }
 
 class CacheStorageCallbacks : public WebServiceWorkerCacheStorage::CacheStorageCallbacks {
     WTF_MAKE_NONCOPYABLE(CacheStorageCallbacks);
 public:
@@ skipping 128 matching lines @@
 
     return promise;
 }
 
 CacheStorage::CacheStorage(WebServiceWorkerCacheStorage* webCacheStorage) : m_webCacheStorage(webCacheStorage)
 {
     ScriptWrappable::init(this);
 }
 
 } // namespace blink