Remove HCheckSmi, LCheckSmi and rename LCheckSmiAndReturn to LCheckSmi.

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index ebc6bb14f5e4fc8d81f66272f09823ed1904243d..aed649291e15b350dfdab040dc1966c245812bc3 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -5215,13 +5215,6 @@ void LCodeGen::DoDoubleToSmi(LDoubleToSmi* instr) {
 }
 
 
-void LCodeGen::DoCheckSmiAndReturn(LCheckSmiAndReturn* instr) {
-  LOperand* input = instr->value();
-  __ SmiTst(ToRegister(input));
-  DeoptimizeIf(ne, instr->environment());
-}
-
-
 void LCodeGen::DoCheckSmi(LCheckSmi* instr) {
   LOperand* input = instr->value();
   __ SmiTst(ToRegister(input));