Cleanup: Remove some unused code, or make them platform specific.

chrome/browser/chrome_browser_main.cc

 // Copyright (c) 2012 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 "chrome/browser/chrome_browser_main.h"
 
 #if defined(TOOLKIT_GTK)
 #include <gtk/gtk.h>
 #endif
 
@@ skipping 495 matching lines @@
   }
 
  private:
   content::NotificationRegistrar registrar_;
   DISALLOW_COPY_AND_ASSIGN(LoadCompleteListener);
 };
 
 }  // namespace
 
 namespace chrome_browser {
+
 // This error message is not localized because we failed to load the
 // localization data files.
+#if defined(OS_WIN)
 const char kMissingLocaleDataTitle[] = "Missing File Error";
+#endif
+
+#if defined(OS_WIN) || defined(TOOLKIT_GTK)
+// TODO(port) This should be used on Linux Aura as well. http://crbug.com/338969
 const char kMissingLocaleDataMessage[] =
     "Unable to find locale data files. Please reinstall.";
+#endif
+
 }  // namespace chrome_browser
 
 // BrowserMainParts ------------------------------------------------------------
 
 // static
 bool ChromeBrowserMainParts::disable_enforcing_cookie_policies_for_tests_ =
     false;
 
 ChromeBrowserMainParts::ChromeBrowserMainParts(
     const content::MainFunctionParams& parameters)
@@ skipping 1151 matching lines @@
   chromeos::CrosSettings::Shutdown();
 #endif
 #endif
 }
 
 // Public members:
 
 void ChromeBrowserMainParts::AddParts(ChromeBrowserMainExtraParts* parts) {
   chrome_extra_parts_.push_back(parts);
 }