Include only stuff you need, part 7: Fix scopes.h -> ast.h.

src/crankshaft/typing.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_CRANKSHAFT_TYPING_H_
 #define V8_CRANKSHAFT_TYPING_H_
 
 #include "src/allocation.h"
 #include "src/ast/ast-type-bounds.h"
 #include "src/ast/ast-types.h"
-#include "src/ast/scopes.h"
+#include "src/ast/ast.h"
 #include "src/ast/variables.h"
 #include "src/effects.h"
 #include "src/type-info.h"
 #include "src/zone.h"
 
 namespace v8 {
 namespace internal {
 
+class DeclarationScope;
+class Isolate;
 class FunctionLiteral;
 
 class AstTyper final : public AstVisitor<AstTyper> {
  public:
   AstTyper(Isolate* isolate, Zone* zone, Handle<JSFunction> closure,
            DeclarationScope* scope, BailoutId osr_ast_id, FunctionLiteral* root,
            AstTypeBounds* bounds);
   void Run();
 
   DEFINE_AST_VISITOR_SUBCLASS_MEMBERS();
@@ skipping 50 matching lines @@
   AST_NODE_LIST(DECLARE_VISIT)
 #undef DECLARE_VISIT
 
   DISALLOW_COPY_AND_ASSIGN(AstTyper);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CRANKSHAFT_TYPING_H_