[iwyu] Include handles.h less.

src/builtins/builtins.h

Index: src/builtins/builtins.h
diff --git a/src/builtins/builtins.h b/src/builtins/builtins.h
index 1a706924aaff8928589990132128701c617d5a24..205f61c2119cfa204a210a36886b29377b5c27d4 100644
--- a/src/builtins/builtins.h
+++ b/src/builtins/builtins.h
@@ -6,11 +6,15 @@
 #define V8_BUILTINS_BUILTINS_H_
 
 #include "src/base/flags.h"
-#include "src/handles.h"
+#include "src/globals.h"
 
 namespace v8 {
 namespace internal {
 
+template <typename T>
+class Handle;
+class Isolate;
+
 #define CODE_AGE_LIST_WITH_ARG(V, A) \
   V(Quadragenarian, A)               \
   V(Quinquagenarian, A)              \