Revert change 5989, which causes failures in some benchmarks.

src/ia32/code-stubs-ia32.h

Index: src/ia32/code-stubs-ia32.h
===================================================================
--- src/ia32/code-stubs-ia32.h	(revision 5989)
+++ src/ia32/code-stubs-ia32.h	(working copy)
@@ -45,7 +45,6 @@
   void Generate(MacroAssembler* masm);
  private:
   TranscendentalCache::Type type_;
-
   Major MajorKey() { return TranscendentalCache; }
   int MinorKey() { return type_; }
   Runtime::FunctionId RuntimeFunction();
@@ -53,24 +52,6 @@
 };
 
 
-// Check the transcendental cache, or generate the result, using SSE2.
-// The argument and result will be in xmm1.
-// Only supports TranscendentalCache::LOG at this point.
-class TranscendentalCacheSSE2Stub: public CodeStub {
- public:
-  explicit TranscendentalCacheSSE2Stub(TranscendentalCache::Type type)
-      : type_(type) {}
-  void Generate(MacroAssembler* masm);
- private:
-  TranscendentalCache::Type type_;
-
-  Major MajorKey() { return TranscendentalCacheSSE2; }
-  int MinorKey() { return type_; }
-  Runtime::FunctionId RuntimeFunction();
-  void GenerateOperation(MacroAssembler* masm);
-};
-
-
 class ToBooleanStub: public CodeStub {
  public:
   ToBooleanStub() { }