Make classes and structures in core/events and core/fetch fast-allocated.

Source/core/fetch/FetchRequest.h

Index: Source/core/fetch/FetchRequest.h
diff --git a/Source/core/fetch/FetchRequest.h b/Source/core/fetch/FetchRequest.h
index bf47dac8c15a202ec5feed2f0a8d7fa508774211..5531a4b22cf88eb94a4267c620ca4fd41bb8ba58 100644
--- a/Source/core/fetch/FetchRequest.h
+++ b/Source/core/fetch/FetchRequest.h
@@ -32,17 +32,20 @@
 #include "core/fetch/ResourceLoaderOptions.h"
 #include "platform/network/ResourceLoadPriority.h"
 #include "platform/network/ResourceRequest.h"
+#include "wtf/Allocator.h"
 #include "wtf/text/AtomicString.h"
 
 namespace blink {
 class SecurityOrigin;
 
 class CORE_EXPORT FetchRequest {
+    STACK_ALLOCATED();
 public:
     enum DeferOption { NoDefer, LazyLoad, DeferredByClient };
     enum OriginRestriction { UseDefaultOriginRestrictionForType, RestrictToSameOrigin, NoOriginRestriction };
 
     struct ResourceWidth {
+        DISALLOW_ALLOCATION();
         float width;
         bool isSet;