Revert r12646 "Support for SDIV" because of failing V8 benchmark.

src/arm/assembler-arm.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 493 matching lines @@
  public:
   // Detect features of the target CPU. Set safe defaults if the serializer
   // is enabled (snapshots must be portable).
   static void Probe();
 
   // Check whether a feature is supported by the target CPU.
   static bool IsSupported(CpuFeature f) {
     ASSERT(initialized_);
     if (f == VFP3 && !FLAG_enable_vfp3) return false;
     if (f == VFP2 && !FLAG_enable_vfp2) return false;
-    if (f == SUDIV && !FLAG_enable_sudiv) return false;
     return (supported_ & (1u << f)) != 0;
   }
 
 #ifdef DEBUG
   // Check whether a feature is currently enabled.
   static bool IsEnabled(CpuFeature f) {
     ASSERT(initialized_);
     Isolate* isolate = Isolate::UncheckedCurrent();
     if (isolate == NULL) {
       // When no isolate is available, work as if we're running in
@@ skipping 338 matching lines @@
            SBit s = LeaveCC, Condition cond = al);
 
   void mvn(Register dst, const Operand& src,
            SBit s = LeaveCC, Condition cond = al);
 
   // Multiply instructions
 
   void mla(Register dst, Register src1, Register src2, Register srcA,
            SBit s = LeaveCC, Condition cond = al);
 
-  void mls(Register dst, Register src1, Register src2, Register srcA,
-           Condition cond = al);
-
-  void sdiv(Register dst, Register src1, Register src2,
-            Condition cond = al);
-
   void mul(Register dst, Register src1, Register src2,
            SBit s = LeaveCC, Condition cond = al);
 
   void smlal(Register dstL, Register dstH, Register src1, Register src2,
              SBit s = LeaveCC, Condition cond = al);
 
   void smull(Register dstL, Register dstH, Register src1, Register src2,
              SBit s = LeaveCC, Condition cond = al);
 
   void umlal(Register dstL, Register dstH, Register src1, Register src2,
@@ skipping 586 matching lines @@
  public:
   explicit EnsureSpace(Assembler* assembler) {
     assembler->CheckBuffer();
   }
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_ASSEMBLER_ARM_H_