[turbofan] Hook up the shift code stubs with TurboFan.

src/compiler/arm/code-generator-arm.cc

Index: src/compiler/arm/code-generator-arm.cc
diff --git a/src/compiler/arm/code-generator-arm.cc b/src/compiler/arm/code-generator-arm.cc
index 5900955e78fd9d2eb8e7d00f0cf19695dc8fd069..fc44e2ab84041b7fa986792a220ca0a5956fd689 100644
--- a/src/compiler/arm/code-generator-arm.cc
+++ b/src/compiler/arm/code-generator-arm.cc
@@ -1657,11 +1657,6 @@ void CodeGenerator::AssembleJumpTable(Label** targets, size_t target_count) {
 }
 
 
-void CodeGenerator::AddNopForSmiCodeInlining() {
-  // On 32-bit ARM we do not insert nops for inlined Smi code.
-}
-
-
 void CodeGenerator::EnsureSpaceForLazyDeopt() {
   if (!info()->ShouldEnsureSpaceForLazyDeopt()) {
     return;