Make classes and structures in core/html fast-allocated.

Source/core/html/parser/HTMLPreloadScanner.h

Index: Source/core/html/parser/HTMLPreloadScanner.h
diff --git a/Source/core/html/parser/HTMLPreloadScanner.h b/Source/core/html/parser/HTMLPreloadScanner.h
index 60c6a9cff9a9b43e61c1689a3be182da49453788..99cfd81650718a648fefac0359f0f072c2cf7b93 100644
--- a/Source/core/html/parser/HTMLPreloadScanner.h
+++ b/Source/core/html/parser/HTMLPreloadScanner.h
@@ -46,6 +46,8 @@ class HTMLTokenizer;
 class SegmentedString;
 
 struct CORE_EXPORT CachedDocumentParameters {
+    WTF_MAKE_FAST_ALLOCATED(CachedDocumentParameters);
+public:
     static PassOwnPtr<CachedDocumentParameters> create(Document* document, PassRefPtrWillBeRawPtr<MediaValues> mediaValues = nullptr)
     {
         return adoptPtr(new CachedDocumentParameters(document, mediaValues));