linux (and some posix): multiprocess plugins compiling.

chrome/plugin/plugin_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.
 
 #include "base/command_line.h"
 #include "base/message_loop.h"
 #include "base/string_util.h"
 #include "base/system_monitor.h"
+#include "build/build_config.h"
 #include "chrome/common/child_process.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/logging_chrome.h"
 #include "chrome/common/main_function_params.h"
+#include "chrome/plugin/plugin_thread.h"
+
+#if defined(OS_WIN)
 #include "chrome/common/win_util.h"
-#include "chrome/plugin/plugin_thread.h"
 #include "chrome/test/injection_test_dll.h"
 #include "sandbox/src/sandbox.h"
+#endif
 
-// mainline routine for running as the plugin process
+// main() routine for running as the plugin process.
 int PluginMain(const MainFunctionParams& parameters) {
-  const CommandLine& parsed_command_line = parameters.command_line_;
-  sandbox::TargetServices* target_services =
-      parameters.sandbox_info_.TargetServices();
-
   // The main thread of the plugin services IO.
   MessageLoopForIO main_message_loop;
   std::wstring app_name = chrome::kBrowserAppName;
   PlatformThread::SetName(WideToASCII(app_name + L"_PluginMain").c_str());
 
   // Initialize the SystemMonitor
   base::SystemMonitor::Start();
 
+#if defined(OS_WIN)
+  const CommandLine& parsed_command_line = parameters.command_line_;
+
+  sandbox::TargetServices* target_services =
+      parameters.sandbox_info_.TargetServices();
+
   CoInitialize(NULL);
   DLOG(INFO) << "Started plugin with " <<
     parsed_command_line.command_line_string();
 
   HMODULE sandbox_test_module = NULL;
   bool no_sandbox = parsed_command_line.HasSwitch(switches::kNoSandbox) ||
                     !parsed_command_line.HasSwitch(switches::kSafePlugins);
   if (target_services && !no_sandbox) {
     // The command line might specify a test plugin to load.
     if (parsed_command_line.HasSwitch(switches::kTestSandbox)) {
       std::wstring test_plugin_name =
           parsed_command_line.GetSwitchValue(switches::kTestSandbox);
       sandbox_test_module = LoadLibrary(test_plugin_name.c_str());
       DCHECK(sandbox_test_module);
     }
   }
 
   if (parsed_command_line.HasSwitch(switches::kPluginStartupDialog)) {
     std::wstring title = chrome::kBrowserAppName;
     title += L" plugin";  // makes attaching to process easier
     win_util::MessageBox(NULL, L"plugin starting...", title,
                          MB_OK | MB_SETFOREGROUND);
   }
+#else
+  NOTIMPLEMENTED() << " non-windows startup, plugin startup dialog etc.";
+#endif
 
   {
     ChildProcess plugin_process(new PluginThread());
-    if (!no_sandbox && target_services) {
+#if defined(OS_WIN)
+    if (!no_sandbox && target_services)
       target_services->LowerToken();
-    }
 
     if (sandbox_test_module) {
       RunRendererTests run_security_tests =
           reinterpret_cast<RunPluginTests>(GetProcAddress(sandbox_test_module,
                                                           kPluginTestCall));
       DCHECK(run_security_tests);
       if (run_security_tests) {
         int test_count = 0;
         DLOG(INFO) << "Running plugin security tests";
         BOOL result = run_security_tests(&test_count);
         DCHECK(result) << "Test number " << test_count << " has failed.";
         // If we are in release mode, crash or debug the process.
         if (!result)
           __debugbreak();
       }
     }
+#endif
 
-    // Load the accelerator table from the browser executable and tell the
-    // message loop to use it when translating messages.
     MessageLoop::current()->Run();
   }
 
+#if defined(OS_WIN)
   CoUninitialize();
+#endif
+
   return 0;
 }