[builtins] Add support for JS builtins written in TurboFan.

src/compiler/js-intrinsic-lowering.h

Index: src/compiler/js-intrinsic-lowering.h
diff --git a/src/compiler/js-intrinsic-lowering.h b/src/compiler/js-intrinsic-lowering.h
index c8ad42e1aadfbcc33246ebba998763d4345366bc..0507b88b72890346b126a5a808b8916a5cdfb889 100644
--- a/src/compiler/js-intrinsic-lowering.h
+++ b/src/compiler/js-intrinsic-lowering.h
@@ -48,7 +48,6 @@ class JSIntrinsicLowering final : public AdvancedReducer {
   Reduction ReduceIsSmi(Node* node);
   Reduction ReduceMathClz32(Node* node);
   Reduction ReduceMathFloor(Node* node);
-  Reduction ReduceMathSqrt(Node* node);
   Reduction ReduceValueOf(Node* node);
   Reduction ReduceFixedArrayGet(Node* node);
   Reduction ReduceFixedArraySet(Node* node);