GTK: Turn on the GTK+ integration by default.

chrome/browser/profile.cc

 // Copyright (c) 2010 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/profile.h"
 
 #include "app/resource_bundle.h"
 #include "app/theme_provider.h"
 #include "base/command_line.h"
 #include "base/file_path.h"
@@ skipping 137 matching lines @@
 void Profile::RegisterUserPrefs(PrefService* prefs) {
   prefs->RegisterBooleanPref(prefs::kSearchSuggestEnabled, true);
   prefs->RegisterBooleanPref(prefs::kSessionExitedCleanly, true);
   prefs->RegisterBooleanPref(prefs::kSafeBrowsingEnabled, true);
   // TODO(estade): IDS_SPELLCHECK_DICTIONARY should be an ASCII string.
   prefs->RegisterLocalizedStringPref(prefs::kSpellCheckDictionary,
       IDS_SPELLCHECK_DICTIONARY);
   prefs->RegisterBooleanPref(prefs::kEnableSpellCheck, true);
   prefs->RegisterBooleanPref(prefs::kEnableAutoSpellCorrect, true);
 #if defined(TOOLKIT_USES_GTK)
-  prefs->RegisterBooleanPref(prefs::kUsesSystemTheme, false);
+  prefs->RegisterBooleanPref(prefs::kUsesSystemTheme,
+                             GtkThemeProvider::DefaultUsesSystemTheme());
 #endif
   prefs->RegisterFilePathPref(prefs::kCurrentThemePackFilename, FilePath());
   prefs->RegisterStringPref(prefs::kCurrentThemeID,
                             UTF8ToWide(BrowserThemeProvider::kDefaultThemeID));
   prefs->RegisterDictionaryPref(prefs::kCurrentThemeImages);
   prefs->RegisterDictionaryPref(prefs::kCurrentThemeColors);
   prefs->RegisterDictionaryPref(prefs::kCurrentThemeTints);
   prefs->RegisterDictionaryPref(prefs::kCurrentThemeDisplayProperties);
   prefs->RegisterBooleanPref(prefs::kDisableExtensions, false);
 }
@@ skipping 1188 matching lines @@
 }
 
 void ProfileImpl::InitSyncService() {
   profile_sync_factory_.reset(
       new ProfileSyncFactoryImpl(this,
                                  CommandLine::ForCurrentProcess()));
   sync_service_.reset(
       profile_sync_factory_->CreateProfileSyncService());
   sync_service_->Initialize();
 }