Make BindStateBase constructor out-of-line

base/callback_internal.cc

 // 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 {
 
+BindStateBase::BindStateBase(InvokeFuncStorage polymorphic_invoke,
+                             void (*destructor)(BindStateBase*))
+      : polymorphic_invoke_(polymorphic_invoke),
+        ref_count_(0), destructor_(destructor) {}
+
 void BindStateBase::AddRef() {
   AtomicRefCountInc(&ref_count_);
 }
 
 void BindStateBase::Release() {
   if (!AtomicRefCountDec(&ref_count_))
     destructor_(this);
 }
 
 CallbackBase<CopyMode::MoveOnly>::CallbackBase(CallbackBase&& c) = default;
@@ skipping 35 matching lines @@
 }
 
 CallbackBase<CopyMode::Copyable>&
 CallbackBase<CopyMode::Copyable>::operator=(CallbackBase&& c) = default;
 
 template class CallbackBase<CopyMode::MoveOnly>;
 template class CallbackBase<CopyMode::Copyable>;
 
 }  // namespace internal
 }  // namespace base