Make startup_tests build and run on Linux (except reference tests).

chrome/browser/browser_init.h

 // 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.
 
 #ifndef CHROME_BROWSER_BROWSER_INIT_H_
 #define CHROME_BROWSER_BROWSER_INIT_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 84 matching lines @@
                                  const std::wstring& cur_dir,
                                  PrefService* prefs, bool process_startup,
                                  Profile* profile, int* return_code);
 
   // Helper function to launch a new browser based on command-line arguments
   // This function takes in a specific profile to use.
   static bool LaunchBrowser(const CommandLine& command_line,
                             Profile* profile, const std::wstring& cur_dir,
                             bool process_startup, int* return_code);
 
-#if defined(OS_WIN)
   template <class AutomationProviderClass>
   static void CreateAutomationProvider(const std::wstring& channel_id,
                                        Profile* profile,
                                        size_t expected_tabs);
-#endif
 
  private:
   // Does the work of LaunchBrowser returning the result.
   static bool LaunchBrowserImpl(const CommandLine& command_line,
                                 Profile* profile, const std::wstring& cur_dir,
                                 bool process_startup, int* return_code);
 
   // This class is for scoping purposes.
   BrowserInit();
   DISALLOW_COPY_AND_ASSIGN(BrowserInit);
 };
 
 #endif  // CHROME_BROWSER_BROWSER_INIT_H_