Clone of chromium aad1ce808763f59c7a3753e08f1500a104ecc6fd refs/remotes/origin/HEAD
diff --git a/base/callback_internal.cc b/base/callback_internal.cc
new file mode 100644
index 0000000..ed0fb0d
--- /dev/null
+++ b/base/callback_internal.cc
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 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_internal.h"
+
+#include "base/logging.h"
+
+namespace base {
+namespace internal {
+
+void CallbackBase::Reset() {
+ polymorphic_invoke_ = NULL;
+ // NULL the bind_state_ last, since it may be holding the last ref to whatever
+ // object owns us, and we may be deleted after that.
+ bind_state_ = NULL;
+}
+
+bool CallbackBase::Equals(const CallbackBase& other) const {
+ return bind_state_.get() == other.bind_state_.get() &&
+ polymorphic_invoke_ == other.polymorphic_invoke_;
+}
+
+CallbackBase::CallbackBase(BindStateBase* bind_state)
+ : bind_state_(bind_state),
+ polymorphic_invoke_(NULL) {
+ DCHECK(!bind_state_.get() || bind_state_->HasOneRef());
+}
+
+CallbackBase::~CallbackBase() {
+}
+
+} // namespace internal
+} // namespace base
