[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 45c3f7e3d0e91f5558c11ed79618a0ea3b7271e5..38b2960e116d230ea060d26cae3deac51a30c28d 100644
--- a/src/code-stub-assembler.cc
+++ b/src/code-stub-assembler.cc
@@ -4380,6 +4380,11 @@ Node* CodeStubAssembler::IntPtrMax(Node* left, Node* right) {
                         MachineType::PointerRepresentation());
 }
 
+Node* CodeStubAssembler::IntPtrMin(Node* left, Node* right) {
+  return SelectConstant(IntPtrLessThanOrEqual(left, right), left, right,
+                        MachineType::PointerRepresentation());
+}
+
 template <class Dictionary>
 Node* CodeStubAssembler::GetNumberOfElements(Node* dictionary) {
   return LoadFixedArrayElement(dictionary, Dictionary::kNumberOfElementsIndex);