[stubs] Unify (and optimize) implementation of ToObject.

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 816defbf58433206fb037a72304692e128020588..c14882c7341337ca52e35e49931c79ed87b74171 100644
--- a/src/compiler/js-intrinsic-lowering.h
+++ b/src/compiler/js-intrinsic-lowering.h
@@ -58,6 +58,7 @@ class JSIntrinsicLowering final : public AdvancedReducer {
   Reduction ReduceGetTypeFeedbackVector(Node* node);
   Reduction ReduceGetCallerJSFunction(Node* node);
   Reduction ReduceThrowNotDateError(Node* node);
+  Reduction ReduceToObject(Node* node);
   Reduction ReduceCallFunction(Node* node);
 
   Reduction Change(Node* node, const Operator* op);