Fix some issues found looking at the code....

base/base_drag_source.cc

 // Copyright (c) 2006-2008 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 <atlbase.h>
-
 #include "base/base_drag_source.h"
 
 ///////////////////////////////////////////////////////////////////////////////
 // BaseDragSource, public:
 
 BaseDragSource::BaseDragSource() : ref_count_(0) {
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // BaseDragSource, IDropSource implementation:
@@ skipping 26 matching lines @@
   if (IsEqualIID(iid, IID_IUnknown) || IsEqualIID(iid, IID_IDropSource)) {
     *object = this;
   } else {
     return E_NOINTERFACE;
   }
   AddRef();
   return S_OK;
 }
 
 ULONG BaseDragSource::AddRef() {
-  return InterlockedIncrement(&ref_count_);
+  return ++ref_count_;
 }
 
 ULONG BaseDragSource::Release() {
-  if (InterlockedDecrement(&ref_count_) == 0) {
-    ULONG copied_refcnt = ref_count_;
+  if (--ref_count_ == 0) {
     delete this;
-    return copied_refcnt;
+    return 0U;
   }
   return ref_count_;
 }
-