Do not delete blink::WebRTCCertificateCallback on non-main thread

base/memory/ptr_util_unittest.cc

Index: base/memory/ptr_util_unittest.cc
diff --git a/base/memory/ptr_util_unittest.cc b/base/memory/ptr_util_unittest.cc
index 5a90b8e7ffd7db68967669d18134169a24ca0da7..b0593bf8a8365f58147e7546e6f1e8a3e9ea96e1 100644
--- a/base/memory/ptr_util_unittest.cc
+++ b/base/memory/ptr_util_unittest.cc
@@ -23,6 +23,19 @@ class DeleteCounter {
   static size_t count_;
 };
 
+struct SumUpDeleter {
+  explicit SumUpDeleter(int* value) : value_(value) {
+  }
+
+  void operator()(int* x) {
+    if (x)
+      *value_ += *x;
+    delete x;
+  }
+
+  int* value_;
+};
+
 size_t DeleteCounter::count_ = 0;
 
 }  // namespace
@@ -37,6 +50,14 @@ TEST(PtrUtilTest, WrapUnique) {
   EXPECT_EQ(0u, DeleteCounter::count());
 }
 
+TEST(PtrUtilTest, WrapUniqueWithDeleter) {
+  int sum = 0;
+  auto p = WrapUnique(new int(42), SumUpDeleter(&sum));
+  EXPECT_EQ(0, sum);
+  p = nullptr;
+  EXPECT_EQ(42, sum);
+}
+
 TEST(PtrUtilTest, MakeUniqueScalar) {
   auto s = MakeUnique<std::string>();
   EXPECT_EQ("", *s);