Adding rtc::Unretained to allow avoiding rtc::Bind reference capture.

webrtc/base/bind_unittest.cc

 /*
  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 69 matching lines @@
   static_assert(                                                      \
       is_same<detail::PointerType<T>::type, scoped_refptr<T>>::value, \
       "PointerType")
 
 EXPECT_IS_CAPTURED_AS_PTR(void);
 EXPECT_IS_CAPTURED_AS_PTR(int);
 EXPECT_IS_CAPTURED_AS_PTR(double);
 EXPECT_IS_CAPTURED_AS_PTR(A);
 EXPECT_IS_CAPTURED_AS_PTR(D);
 EXPECT_IS_CAPTURED_AS_PTR(RefCountInterface*);
+EXPECT_IS_CAPTURED_AS_PTR(
+    decltype(Unretained<RefCountedObject<RefCountInterface>>));
 
 EXPECT_IS_CAPTURED_AS_SCOPED_REFPTR(RefCountInterface);
 EXPECT_IS_CAPTURED_AS_SCOPED_REFPTR(B);
 EXPECT_IS_CAPTURED_AS_SCOPED_REFPTR(C);
 EXPECT_IS_CAPTURED_AS_SCOPED_REFPTR(E);
 EXPECT_IS_CAPTURED_AS_SCOPED_REFPTR(F);
 EXPECT_IS_CAPTURED_AS_SCOPED_REFPTR(RefCountedObject<RefCountInterface>);
 EXPECT_IS_CAPTURED_AS_SCOPED_REFPTR(RefCountedObject<B>);
 EXPECT_IS_CAPTURED_AS_SCOPED_REFPTR(RefCountedObject<C>);
 EXPECT_IS_CAPTURED_AS_SCOPED_REFPTR(const RefCountedObject<RefCountInterface>);
@@ skipping 111 matching lines @@
 // modified to a non-reference capture.
 TEST(BindTest, RefArgument) {
   const int x = 42;
   EXPECT_EQ(&x, Ref(x));
   // Bind() should make a copy of |x|, i.e. the pointers should be different.
   auto functor = Bind(&Ref, x);
   EXPECT_NE(&x, functor());
 }
 
 }  // namespace rtc