Simplify HUnaryMathOperation::Canonicalize.

src/ia32/lithium-ia32.cc

Index: src/ia32/lithium-ia32.cc
diff --git a/src/ia32/lithium-ia32.cc b/src/ia32/lithium-ia32.cc
index b4b44521cd0c0a4dd3227a455b3683f0b4b6f2fa..06942ba38d42f5f148759c4b33d27417579d5ece 100644
--- a/src/ia32/lithium-ia32.cc
+++ b/src/ia32/lithium-ia32.cc
@@ -1354,25 +1354,6 @@ LInstruction* LChunkBuilder::DoDiv(HDiv* instr) {
 }
 
 
-HValue* LChunkBuilder::SimplifiedDivisorForMathFloorOfDiv(HValue* divisor) {
-  if (divisor->IsConstant() &&
-      HConstant::cast(divisor)->HasInteger32Value()) {
-    HConstant* constant_val = HConstant::cast(divisor);
-    return constant_val->CopyToRepresentation(Representation::Integer32(),
-                                              divisor->block()->zone());
-  }
-  // A value with an integer representation does not need to be transformed.
-  if (divisor->representation().IsInteger32()) {
-    return divisor;
-  // A change from an integer32 can be replaced by the integer32 value.
-  } else if (divisor->IsChange() &&
-             HChange::cast(divisor)->from().IsInteger32()) {
-    return HChange::cast(divisor)->value();
-  }
-  return NULL;
-}
-
-
 LInstruction* LChunkBuilder::DoMathFloorOfDiv(HMathFloorOfDiv* instr) {
   HValue* right = instr->right();
   if (!right->IsConstant()) {