Base: A few more files using BASE_API (for base.dll)

base/debug/stack_trace.h

Index: base/debug/stack_trace.h
===================================================================
--- base/debug/stack_trace.h	(revision 79303)
+++ base/debug/stack_trace.h	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -8,6 +8,7 @@
 
 #include <iosfwd>
 
+#include "base/base_api.h"
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
@@ -20,7 +21,7 @@
 // A stacktrace can be helpful in debugging. For example, you can include a
 // stacktrace member in a object (probably around #ifndef NDEBUG) so that you
 // can later see where the given object was created from.
-class StackTrace {
+class BASE_API StackTrace {
  public:
   // Creates a stacktrace from the current location.
   StackTrace();