Delete unused code in chrome/common or mark them as platform specific.

chrome/browser/first_run/first_run.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/first_run/first_run.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
@@ skipping 358 matching lines @@
   if (contents &&
       (contents->GetURL().GetOrigin().spec() ==
            chrome::kChromeUIChromeSigninURL ||
        gaia::IsGaiaSignonRealm(contents->GetURL().GetOrigin()) ||
        contents->GetURL() ==
            chrome::GetSettingsUrl(chrome::kSyncSetupSubPage))) {
     return;
   }
 
   if (contents && contents->GetURL().SchemeIs(content::kChromeUIScheme)) {
+#if defined(OS_WIN)
     // Suppress the first run bubble if 'make chrome metro' flow is showing.
     if (contents->GetURL().host() == chrome::kChromeUIMetroFlowHost)
       return;
+#endif
 
     // Suppress the first run bubble if the NTP sync promo bubble is showing
     // or if sign in is in progress.
     if (contents->GetURL().host() == chrome::kChromeUINewTabHost) {
       Profile* profile =
           Profile::FromBrowserContext(contents->GetBrowserContext());
       SigninManagerBase* manager =
           SigninManagerFactory::GetForProfile(profile);
       bool signin_in_progress = manager && manager->AuthInProgress();
       bool is_promo_bubble_visible =
@@ skipping 410 matching lines @@
   SetShouldDoPersonalDataManagerFirstRun();
 
   internal::DoPostImportPlatformSpecificTasks(profile);
 }
 
 uint16 auto_import_state() {
   return g_auto_import_state;
 }
 
 }  // namespace first_run