[builtins] Sanitize the machinery around Construct calls.

src/crankshaft/x64/lithium-x64.cc

Index: src/crankshaft/x64/lithium-x64.cc
diff --git a/src/crankshaft/x64/lithium-x64.cc b/src/crankshaft/x64/lithium-x64.cc
index 1e3e52b47cad02960c944ad22cf873d1bf560dbe..97a56a489d34eff71501b4d2766516bef3051bee 100644
--- a/src/crankshaft/x64/lithium-x64.cc
+++ b/src/crankshaft/x64/lithium-x64.cc
@@ -311,13 +311,6 @@ void LInvokeFunction::PrintDataTo(StringStream* stream) {
 }
 
 
-void LCallNew::PrintDataTo(StringStream* stream) {
-  stream->Add("= ");
-  constructor()->PrintTo(stream);
-  stream->Add(" #%d / ", arity());
-}
-
-
 void LCallNewArray::PrintDataTo(StringStream* stream) {
   stream->Add("= ");
   constructor()->PrintTo(stream);
@@ -1231,14 +1224,6 @@ LInstruction* LChunkBuilder::DoMathPowHalf(HUnaryMathOperation* instr) {
 }
 
 
-LInstruction* LChunkBuilder::DoCallNew(HCallNew* instr) {
-  LOperand* context = UseFixed(instr->context(), rsi);
-  LOperand* constructor = UseFixed(instr->constructor(), rdi);
-  LCallNew* result = new(zone()) LCallNew(context, constructor);
-  return MarkAsCall(DefineFixed(result, rax), instr);
-}
-
-
 LInstruction* LChunkBuilder::DoCallNewArray(HCallNewArray* instr) {
   LOperand* context = UseFixed(instr->context(), rsi);
   LOperand* constructor = UseFixed(instr->constructor(), rdi);