Notify DevTools about cached resources when stylesheet is restored.

Source/core/css/CSSImageValue.cpp

Index: Source/core/css/CSSImageValue.cpp
diff --git a/Source/core/css/CSSImageValue.cpp b/Source/core/css/CSSImageValue.cpp
index 615bf7685572dffe25e697c5d160595883e109c4..fe2e668ad2cdbe37f564cd43b888c10169d17ce4 100644
--- a/Source/core/css/CSSImageValue.cpp
+++ b/Source/core/css/CSSImageValue.cpp
@@ -85,6 +85,7 @@ void CSSImageValue::restoreCachedResourceIfNeeded(Document& document)
         return;
 
     FetchRequest request(ResourceRequest(m_absoluteURL), m_initiatorName.isEmpty() ? FetchInitiatorTypeNames::css : m_initiatorName, resource->options());
+    document.fetcher()->notifyLoadedFromMemoryCache(resource);
     document.fetcher()->requestLoadStarted(resource, request, ResourceFetcher::ResourceLoadingFromCache);
 }