Replace "WINAPI" with platform-independent "API_CALL".

webkit/default_plugin/default_plugin.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 "base/logging.h"
 #include "webkit/default_plugin/plugin_main.h"
 
 extern "C" {
-NPError WINAPI NP_GetEntryPoints(NPPluginFuncs* funcs) {
+NPError API_CALL NP_GetEntryPoints(NPPluginFuncs* funcs) {
   return default_plugin::NP_GetEntryPoints(funcs);
 }
 
-NPError WINAPI NP_Initialize(NPNetscapeFuncs* funcs) {
+NPError API_CALL NP_Initialize(NPNetscapeFuncs* funcs) {
   return default_plugin::NP_Initialize(funcs);
 }
 
-NPError WINAPI NP_Shutdown() {
+NPError API_CALL NP_Shutdown() {
   return default_plugin::NP_Shutdown();
 }
 } // extern "C"
-