callback_forward.h forward-declares base::Callback and base::Closure.
This CL includes callback_forward.h and a number of files that depend on it. Other CLs have been sent to other reviewers, according to OWNERS files. This search shows the other CLs: http://goo.gl/vzQoJ
See this chromium-dev thread for the rationale behind the change: http://goo.gl/I3kob
BUG=None
TEST=Compiles
Review URL: http://codereview.chromium.org/8702019
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@111782 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/base/callback_forward.h b/base/callback_forward.h
new file mode 100644
index 0000000..0f62864b
--- /dev/null
+++ b/base/callback_forward.h
@@ -0,0 +1,18 @@
+// Copyright (c) 2011 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.
+
+#ifndef BASE_CALLBACK_FORWARD_H_
+#define BASE_CALLBACK_FORWARD_H_
+#pragma once
+
+namespace base {
+
+template <typename Sig>
+class Callback;
+
+typedef Callback<void(void)> Closure;
+
+} // namespace base
+
+#endif // BASE_CALLBACK_FORWARD_H
