[turbofan] Introduce DeoptimizeIf And DeoptimizeUnless common operators.

src/compiler/js-generic-lowering.cc

Index: src/compiler/js-generic-lowering.cc
diff --git a/src/compiler/js-generic-lowering.cc b/src/compiler/js-generic-lowering.cc
index b6cd40d21df56edff64f226b2f9fb7395ff5571b..8b5180ad97e20b0dbb5ae474fbad534e507f9b65 100644
--- a/src/compiler/js-generic-lowering.cc
+++ b/src/compiler/js-generic-lowering.cc
@@ -45,6 +45,8 @@ Reduction JSGenericLowering::Reduce(Node* node) {
     JS_OP_LIST(DECLARE_CASE)
 #undef DECLARE_CASE
     case IrOpcode::kBranch:
+    case IrOpcode::kDeoptimizeIf:
+    case IrOpcode::kDeoptimizeUnless:
       // TODO(mstarzinger): If typing is enabled then simplified lowering will
       // have inserted the correct ChangeBoolToBit, otherwise we need to perform
       // poor-man's representation inference here and insert manual change.