Introduce base::IgnoreReuse() to wrap OnceCallback into RepeatingCallback

base/callback_helpers_unittest.cc

Index: base/callback_helpers_unittest.cc
diff --git a/base/callback_helpers_unittest.cc b/base/callback_helpers_unittest.cc
index 6c48d7ce4e52eeea056722df4cd97f8047f68292..19d9acbe0542470ef40c8748f38386d717e00bcb 100644
--- a/base/callback_helpers_unittest.cc
+++ b/base/callback_helpers_unittest.cc
@@ -109,4 +109,19 @@ TEST(CallbackHelpersTest, TestScopedClosureRunnerMoveAssignment) {
   EXPECT_EQ(1, run_count_2);
 }
 
+TEST(CallbackHelpersTest, TestIgnoreReuse) {
+  int count = 0;
+  base::OnceCallback<void(int*)> cb =
+      base::BindOnce([](int* count) { ++*count; });
+
+  base::RepeatingCallback<void(int*)> wrapped =
+      base::IgnoreReuse(std::move(cb));
+
+  EXPECT_EQ(0, count);
+  wrapped.Run(&count);
+  EXPECT_EQ(1, count);
+  wrapped.Run(&count);
+  EXPECT_EQ(1, count);
+}
+
 }  // namespace