Add upstream code as of Chromium r334380.

Copy the unchanged source from
https://chromium.googlesource.com/chromium/src/base/ as of
r334380 (really r334285 a.k.a. 23911a0c in the base/
subtree).

Also add MODULE_LICENSE_BSD and copy Chromium's current
LICENSE file to NOTICE.

Bug: 22317122
Change-Id: I89863bfeca67b3a1ff05e6078f2f9ee4e31c5c99
diff --git a/base/callback_list_unittest.nc b/base/callback_list_unittest.nc
new file mode 100644
index 0000000..2d464cf
--- /dev/null
+++ b/base/callback_list_unittest.nc
@@ -0,0 +1,51 @@
+// 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_list.h"
+
+#include "base/basictypes.h"
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/memory/scoped_ptr.h"
+
+namespace base {
+
+class Foo {
+ public:
+  Foo() {}
+  ~Foo() {}
+};
+
+class FooListener {
+ public:
+  FooListener() {}
+
+  void GotAScopedFoo(scoped_ptr<Foo> f) { foo_ = f.Pass(); }
+
+  scoped_ptr<Foo> foo_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(FooListener);
+};
+
+
+#if defined(NCTEST_MOVE_ONLY_TYPE_PARAMETER)  // [r"calling a private constructor of class"]
+
+// Callbacks run with a move-only typed parameter.
+//
+// CallbackList does not support move-only typed parameters. Notify() is
+// designed to take zero or more parameters, and run each registered callback
+// with them. With move-only types, the parameter will be set to NULL after the
+// first callback has been run.
+void WontCompile() {
+  FooListener f;
+  CallbackList<void(scoped_ptr<Foo>)> c1;
+  scoped_ptr<CallbackList<void(scoped_ptr<Foo>)>::Subscription> sub =
+      c1.Add(Bind(&FooListener::GotAScopedFoo, Unretained(&f)));
+  c1.Notify(scoped_ptr<Foo>(new Foo()));
+}
+
+#endif
+
+}  // namespace base