Remove all the browser side extensions code from Android.

chrome/browser/profiles/profile.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/profiles/profile.h"
 
 #include <string>
 
 #include "base/prefs/pref_service.h"
 #include "build/build_config.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/first_run/first_run.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/sync/profile_sync_service.h"
 #include "chrome/browser/sync/profile_sync_service_factory.h"
 #include "chrome/common/pref_names.h"
 #include "components/data_reduction_proxy/browser/data_reduction_proxy_prefs.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "components/sync_driver/sync_prefs.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_source.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_ui.h"
-#include "extensions/browser/pref_names.h"
 
 #if defined(OS_CHROMEOS)
 #include "base/command_line.h"
 #include "chrome/common/chrome_switches.h"
 #include "chromeos/chromeos_switches.h"
 #endif
 
 #if defined(OS_ANDROID) && defined(FULL_SAFE_BROWSING)
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
 #endif
 
+#if defined(ENABLE_EXTENSIONS)
+#include "extensions/browser/pref_names.h"
+#endif
+
 Profile::Profile()
     : restored_last_session_(false),
       sent_destroyed_notification_(false),
       accessibility_pause_level_(0) {
 }
 
 Profile::~Profile() {
 }
 
 // static
@@ skipping 78 matching lines @@
 #if defined(ENABLE_GOOGLE_NOW)
   registry->RegisterBooleanPref(
       prefs::kGoogleGeolocationAccessEnabled,
       false,
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 #endif
   registry->RegisterBooleanPref(
       prefs::kDisableExtensions,
       false,
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
+#if defined(ENABLE_EXTENSIONS)
   registry->RegisterBooleanPref(
       extensions::pref_names::kAlertsInitialized,
       false,
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
+#endif
   registry->RegisterStringPref(
       prefs::kSelectFileLastDirectory,
       std::string(),
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
   registry->RegisterDoublePref(
       prefs::kDefaultZoomLevel,
       0.0,
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
   registry->RegisterDictionaryPref(
       prefs::kPerHostZoomLevels,
@@ skipping 102 matching lines @@
         content::NotificationService::NoDetails());
   }
 }
 
 bool ProfileCompare::operator()(Profile* a, Profile* b) const {
   DCHECK(a && b);
   if (a->IsSameProfile(b))
     return false;
   return a->GetOriginalProfile() < b->GetOriginalProfile();
 }