Replace usage of WebVector::isEmpty with WebVector::empty().

third_party/WebKit/Source/modules/cachestorage/InspectorCacheStorageAgent.cpp

Index: third_party/WebKit/Source/modules/cachestorage/InspectorCacheStorageAgent.cpp
diff --git a/third_party/WebKit/Source/modules/cachestorage/InspectorCacheStorageAgent.cpp b/third_party/WebKit/Source/modules/cachestorage/InspectorCacheStorageAgent.cpp
index 0083b340361a8b6edb48671905ce3564b06908ba..5f30879d9db0367836870c59b6b70e8351dce47c 100644
--- a/third_party/WebKit/Source/modules/cachestorage/InspectorCacheStorageAgent.cpp
+++ b/third_party/WebKit/Source/modules/cachestorage/InspectorCacheStorageAgent.cpp
@@ -266,7 +266,7 @@ class GetCacheKeysForRequestData
 
   WebServiceWorkerCache* cache() { return m_cache.get(); }
   void onSuccess(const WebVector<WebServiceWorkerRequest>& requests) override {
-    if (requests.isEmpty()) {
+    if (requests.empty()) {
       std::unique_ptr<Array<DataEntry>> array = Array<DataEntry>::create();
       m_callback->sendSuccess(std::move(array), false);
       return;