[builtins] Introduce proper Float64Cos and Float64Sin.

src/compiler/simplified-lowering.cc

Index: src/compiler/simplified-lowering.cc
diff --git a/src/compiler/simplified-lowering.cc b/src/compiler/simplified-lowering.cc
index 9ce76688c9ad8df2686d10d6a230b60bac41b272..6c14884e29fc584a16ddfa15792c131de96c81d6 100644
--- a/src/compiler/simplified-lowering.cc
+++ b/src/compiler/simplified-lowering.cc
@@ -1443,13 +1443,15 @@ class RepresentationSelector {
       }
       case IrOpcode::kNumberAtan:
       case IrOpcode::kNumberAtanh:
+      case IrOpcode::kNumberCos:
       case IrOpcode::kNumberExp:
       case IrOpcode::kNumberExpm1:
       case IrOpcode::kNumberLog:
       case IrOpcode::kNumberLog1p:
       case IrOpcode::kNumberLog2:
       case IrOpcode::kNumberLog10:
-      case IrOpcode::kNumberCbrt: {
+      case IrOpcode::kNumberCbrt:
+      case IrOpcode::kNumberSin: {
         VisitUnop(node, UseInfo::TruncatingFloat64(),
                   MachineRepresentation::kFloat64);
         if (lower()) NodeProperties::ChangeOp(node, Float64Op(node));