Various IWYU fixes.

src/ast/scopeinfo.cc

Index: src/ast/scopeinfo.cc
diff --git a/src/ast/scopeinfo.cc b/src/ast/scopeinfo.cc
index e60a7cb75bf2a8c0f9e21f3aa5c661a5724695ce..9c7fedbdaa342b308c7e91ec9e1a6c17b7456027 100644
--- a/src/ast/scopeinfo.cc
+++ b/src/ast/scopeinfo.cc
@@ -10,6 +10,7 @@
 #include "src/ast/scopes.h"
 #include "src/ast/variables.h"
 #include "src/bootstrapper.h"
+#include "src/objects-inl.h"
 
 namespace v8 {
 namespace internal {