[turbofan] Add support for %_MaxSmi and %_TypedArrayMaxSizeInHeap.

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 50fcd8ce2b67df44864a6e9c4b08a3c0188933ce..d139e674ff808a5c371a7604990ac0e768b91055 100644
--- a/src/compiler/js-intrinsic-lowering.h
+++ b/src/compiler/js-intrinsic-lowering.h
@@ -61,6 +61,11 @@ class V8_EXPORT_PRIVATE JSIntrinsicLowering final
   Reduction ReduceCall(Node* node);
   Reduction ReduceGetSuperConstructor(Node* node);
 
+  // TODO(turbofan): typedarray.js support; drop once TypedArrays are
+  // converted to proper CodeStubAssembler based builtins.
+  Reduction ReduceMaxSmi(Node* node);
+  Reduction ReduceTypedArrayMaxSizeInHeap(Node* node);
+
   // TODO(turbofan): collection.js support; drop once Maps and Sets are
   // converted to proper CodeStubAssembler based builtins.
   Reduction ReduceJSCollectionGetTable(Node* node);