Simplify and fix code aging.

src/x64/codegen-x64.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 21 matching lines @@
 #include "ic-inl.h"
 
 namespace v8 {
 namespace internal {
 
 // Forward declarations
 class CompilationInfo;
 
 enum TypeofState { INSIDE_TYPEOF, NOT_INSIDE_TYPEOF };
 
-static const int kSizeOfFullCodegenStrictModePrologue = 14;
-static const int kSizeOfOptimizedStrictModePrologue = 14;
-
 // -------------------------------------------------------------------------
 // CodeGenerator
 
 class CodeGenerator: public AstVisitor {
  public:
   static bool MakeCode(CompilationInfo* info);
 
   // Printing of AST, etc. as requested by flags.
   static void MakeCodePrologue(CompilationInfo* info);
 
@@ skipping 41 matching lines @@
                           Register temp1,
                           Register temp2);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MathExpGenerator);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_CODEGEN_X64_H_