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

base/callback_helpers_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/callback_helpers.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 91 matching lines @@
       EXPECT_EQ(0, run_count_1);
       EXPECT_EQ(0, run_count_2);
     }
     EXPECT_EQ(0, run_count_1);
     EXPECT_EQ(0, run_count_2);
   }
   EXPECT_EQ(0, run_count_1);
   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