Make workers functional on OSX and Linux.

chrome/app/chrome_dll_main.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.
 
 // TODO(port): the ifdefs in here are a first step towards trying to determine
 // the correct abstraction for all the OS functionality required at this
 // stage of process initialization. It should not be taken as a final
 // abstraction.
 
 #include "build/build_config.h"
@@ skipping 460 matching lines @@
 
   // TODO(port): turn on these main() functions as they've been de-winified.
   int rv = -1;
   if (process_type == switches::kRendererProcess) {
     rv = RendererMain(main_params);
   } else if (process_type == switches::kPluginProcess) {
     rv = PluginMain(main_params);
   } else if (process_type == switches::kUtilityProcess) {
     rv = UtilityMain(main_params);
   } else if (process_type == switches::kWorkerProcess) {
-#if defined(OS_WIN)
     rv = WorkerMain(main_params);
-#else
-    NOTIMPLEMENTED();
-#endif
   } else if (process_type == switches::kZygoteProcess) {
 #if defined(OS_LINUX)
     if (ZygoteMain(main_params)) {
       // Zygote::HandleForkRequest may have reallocated the command
       // line so update it here with the new version.
       const CommandLine& parsed_command_line =
         *CommandLine::ForCurrentProcess();
       MainFunctionParams main_params(parsed_command_line, sandbox_wrapper,
                                      &autorelease_pool);
       RendererMain(main_params);
@@ skipping 29 matching lines @@
   _CrtDumpMemoryLeaks();
 #endif  // _CRTDBG_MAP_ALLOC
 
   _Module.Term();
 #endif
 
   logging::CleanupChromeLogging();
 
   return rv;
 }