Don't sync default_search_provider.synced_guid to mobile.

components/search_engines/template_url_service.cc

 // Copyright 2014 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 "components/search_engines/template_url_service.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 265 matching lines @@
 
 TemplateURLService::~TemplateURLService() {
   // |web_data_service_| should be deleted during Shutdown().
   DCHECK(!web_data_service_.get());
   STLDeleteElements(&template_urls_);
 }
 
 // static
 void TemplateURLService::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
+#if defined(OS_IOS) || defined(OS_ANDROID)
+  uint32_t flags = PrefRegistry::NO_REGISTRATION_FLAGS;
+#else
+  uint32_t flags = user_prefs::PrefRegistrySyncable::SYNCABLE_PREF;
+#endif
   registry->RegisterStringPref(prefs::kSyncedDefaultSearchProviderGUID,
                                std::string(),
-                               user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
+                               flags);
   registry->RegisterBooleanPref(prefs::kDefaultSearchProviderEnabled, true);
   registry->RegisterStringPref(prefs::kDefaultSearchProviderName,
                                std::string());
   registry->RegisterStringPref(prefs::kDefaultSearchProviderID, std::string());
   registry->RegisterStringPref(prefs::kDefaultSearchProviderPrepopulateID,
                                std::string());
   registry->RegisterStringPref(prefs::kDefaultSearchProviderSuggestURL,
                                std::string());
   registry->RegisterStringPref(prefs::kDefaultSearchProviderSearchURL,
                                std::string());
@@ skipping 2169 matching lines @@
 
   if (most_recently_intalled_default) {
     base::AutoReset<DefaultSearchChangeOrigin> change_origin(
         &dsp_change_origin_, DSP_CHANGE_OVERRIDE_SETTINGS_EXTENSION);
     default_search_manager_.SetExtensionControlledDefaultSearchEngine(
         most_recently_intalled_default->data());
   } else {
     default_search_manager_.ClearExtensionControlledDefaultSearchEngine();
   }
 }