Simplify computation of environment stack delta.

src/compiler/ast-graph-builder.h

 // Copyright 2014 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_COMPILER_AST_GRAPH_BUILDER_H_
 #define V8_COMPILER_AST_GRAPH_BUILDER_H_
 
 #include "src/ast.h"
 #include "src/compiler/js-graph.h"
 
@@ skipping 266 matching lines @@
   // Visit expressions.
   void Visit(Expression* expr);
   void VisitForTest(Expression* expr);
   void VisitForEffect(Expression* expr);
   void VisitForValue(Expression* expr);
   void VisitForValueOrNull(Expression* expr);
   void VisitForValueOrTheHole(Expression* expr);
   void VisitForValues(ZoneList<Expression*>* exprs);
 
   // Common for all IterationStatement bodies.
-  void VisitIterationBody(IterationStatement* stmt, LoopBuilder* loop, int);
+  void VisitIterationBody(IterationStatement* stmt, LoopBuilder* loop);
 
   // Dispatched from VisitCallRuntime.
   void VisitCallJSRuntime(CallRuntime* expr);
 
   // Dispatched from VisitUnaryOperation.
   void VisitDelete(UnaryOperation* expr);
   void VisitVoid(UnaryOperation* expr);
   void VisitTypeof(UnaryOperation* expr);
   void VisitNot(UnaryOperation* expr);
 
@@ skipping 158 matching lines @@
 
   // Prepare environment to be used as loop header.
   void PrepareForLoop(BitVector* assigned, bool is_osr = false);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_AST_GRAPH_BUILDER_H_