Move base::WeakPtrFactory's ctor and dtor out-of-line

base/memory/weak_ptr.cc

 // 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.
 
 #include "base/memory/weak_ptr.h"
 
 namespace base {
 namespace internal {
 
 WeakReference::Flag::Flag() : is_valid_(true) {
@@ skipping 59 matching lines @@
 
 WeakPtrBase::WeakPtrBase() {
 }
 
 WeakPtrBase::~WeakPtrBase() {
 }
 
 WeakPtrBase::WeakPtrBase(const WeakReference& ref) : ref_(ref) {
 }
 
+WeakPtrFactoryBase::WeakPtrFactoryBase(uintptr_t ptr) : ptr_(ptr) {}
+
+WeakPtrFactoryBase::~WeakPtrFactoryBase() {
+  ptr_ = 0;
+}
+
 }  // namespace internal
 }  // namespace base