Remove x86 jump elimination.

src/assembler-ia32.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 709 matching lines @@
   // True if the assembler owns the buffer, false if buffer is external.
   bool own_buffer_;
 
   // code generation
   byte* pc_;  // the program counter; moves forward
   RelocInfoWriter reloc_info_writer;
 
   // push-pop elimination
   byte* last_pc_;
 
-  // Jump-to-jump elimination:
-  // The last label to be bound to _binding_pos, if unbound.
-  Label unbound_label_;
-  // The position to which _unbound_label has to be bound, if present.
-  int binding_pos_;
-  // The position before which jumps cannot be eliminated.
-  int last_bound_pos_;
-
   // source position information
   int last_position_;
   int last_statement_position_;
 
   byte* addr_at(int pos)  { return buffer_ + pos; }
   byte byte_at(int pos)  { return buffer_[pos]; }
   uint32_t long_at(int pos)  {
     return *reinterpret_cast<uint32_t*>(addr_at(pos));
   }
   void long_at_put(int pos, uint32_t x)  {
@@ skipping 62 matching lines @@
  private:
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ASSEMBLER_IA32_H_