includes: Make ast.h not need isolate.h any more.

src/ast/ast-numbering.cc

Index: src/ast/ast-numbering.cc
diff --git a/src/ast/ast-numbering.cc b/src/ast/ast-numbering.cc
index 96f138241f0c2dce36472543c3487ee08836a370..9d4cd08064b34c355d0dd6441975d4bc849a29cc 100644
--- a/src/ast/ast-numbering.cc
+++ b/src/ast/ast-numbering.cc
@@ -6,6 +6,8 @@
 
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
+#include "src/execution.h"
+#include "src/isolate.h"
 
 namespace v8 {
 namespace internal {
@@ -21,7 +23,7 @@ class AstNumberingVisitor final : public AstVisitor<AstNumberingVisitor> {
         slot_cache_(zone),
         dont_optimize_reason_(kNoReason),
         catch_prediction_(HandlerTable::UNCAUGHT) {
-    InitializeAstVisitor(isolate);
+    InitializeAstVisitor(isolate->stack_guard()->real_climit());
   }
 
   bool Renumber(FunctionLiteral* node);