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

Source/core/loader/LinkHeader.h

Index: Source/core/loader/LinkHeader.h
diff --git a/Source/core/loader/LinkHeader.h b/Source/core/loader/LinkHeader.h
index af14abf0e417ff36d1b8fbb8ad73d4c29061eba1..a3b983637c239ad2c78cdb6eb23a5e0f11b26d38 100644
--- a/Source/core/loader/LinkHeader.h
+++ b/Source/core/loader/LinkHeader.h
@@ -7,11 +7,13 @@
 
 #include "core/CoreExport.h"
 #include "core/html/CrossOriginAttribute.h"
+#include "wtf/Allocator.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class LinkHeader {
+    ALLOW_ONLY_INLINE_ALLOCATION();
 public:
     template <typename CharType>
     LinkHeader(CharType*& position, CharType* end);
@@ -38,6 +40,7 @@ private:
 };
 
 class CORE_EXPORT LinkHeaderSet {
+    STACK_ALLOCATED();
 public:
     LinkHeaderSet(const String& header);