net: Add NET_API to net/base

net/base/data_url.h

Index: net/base/data_url.h
===================================================================
--- net/base/data_url.h	(revision 85332)
+++ net/base/data_url.h	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2008 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 +8,8 @@
 
 #include <string>
 
+#include "net/base/net_api.h"
+
 class GURL;
 
 namespace net {
@@ -26,7 +28,7 @@
 // If <mediatype> is omitted, it defaults to text/plain;charset=US-ASCII.  As a
 // shorthand, "text/plain" can be omitted but the charset parameter supplied.
 //
-class DataURL {
+class NET_API DataURL {
  public:
   // This method can be used to parse a 'data' URL into its component pieces.
   //