[runtime] Port simple String.prototype.indexOf cases to TF Builtin

src/code-stub-assembler.cc

Index: src/code-stub-assembler.cc
diff --git a/src/code-stub-assembler.cc b/src/code-stub-assembler.cc
index 0cad3b77217fe239940179ac5593a3efc2536f68..52443abdc5ae60fd4e4308a6a6c77f10ce3450f7 100644
--- a/src/code-stub-assembler.cc
+++ b/src/code-stub-assembler.cc
@@ -4142,6 +4142,11 @@ Node* CodeStubAssembler::IntPtrMax(Node* left, Node* right) {
                 MachineType::PointerRepresentation());
 }
 
+Node* CodeStubAssembler::IntPtrMin(Node* left, Node* right) {
+  return Select(IntPtrLessThanOrEqual(left, right), left, right,
+                MachineType::PointerRepresentation());
+}
+
 template <class Dictionary>
 Node* CodeStubAssembler::GetNumberOfElements(Node* dictionary) {
   return LoadFixedArrayElement(