linux: unexport as many symbols as possible

plugin/linux/main_linux.cc

 /*
  * Copyright 2009, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 604 matching lines @@
 }
 
 }  // end anonymous namespace
 
 #if defined(O3D_INTERNAL_PLUGIN)
 namespace o3d {
 #else
 extern "C" {
 #endif
 
-NPError OSCALL NP_Initialize(NPNetscapeFuncs *browserFuncs,
-                             NPPluginFuncs *pluginFuncs) {
+NPError EXPORT_SYMBOL OSCALL NP_Initialize(NPNetscapeFuncs *browserFuncs,
+                                           NPPluginFuncs *pluginFuncs) {
   NPError retval = InitializeNPNApi(browserFuncs);
   if (retval != NPERR_NO_ERROR) return retval;
   NP_GetEntryPoints(pluginFuncs);
   return InitializePlugin();
 }
 
-NPError OSCALL NP_Shutdown(void) {
+NPError EXPORT_SYMBOL OSCALL NP_Shutdown(void) {
   HANDLE_CRASHES;
   DLOG(INFO) << "NP_Shutdown";
 
   CommandLine::Terminate();
 
   // Force all base singletons to be destroyed.
   g_at_exit_manager.reset(NULL);
 
   return NPERR_NO_ERROR;
 }
@@ skipping 159 matching lines @@
 bool  PluginObject::RequestFullscreenDisplay() {
   // TODO: Unimplemented.
   return false;
 }
 
 void PluginObject::CancelFullscreenDisplay() {
   // TODO: Unimplemented.
 }
 }  // namespace _o3d
 }  // namespace glue