Make the ENABLE_APP_LIST build flag work on Linux

chrome/browser/prefs/browser_prefs.cc

 // Copyright 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/prefs/browser_prefs.h"
 
 #include <string>
 
 #include "base/metrics/histogram_macros.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 488 matching lines @@
 #if BUILDFLAG(ANDROID_JAVA_UI)
   variations::VariationsService::RegisterProfilePrefs(registry);
   MostVisitedSites::RegisterProfilePrefs(registry);
   NewTabPagePrefs::RegisterProfilePrefs(registry);
   PartnerBookmarksShim::RegisterProfilePrefs(registry);
   PopularSites::RegisterProfilePrefs(registry);
 #else
   AppShortcutManager::RegisterProfilePrefs(registry);
   DeviceIDFetcher::RegisterProfilePrefs(registry);
   DevToolsWindow::RegisterProfilePrefs(registry);
+#if defined(ENABLE_APP_LIST)
   DriveAppMapping::RegisterProfilePrefs(registry);
+#endif
   extensions::CommandService::RegisterProfilePrefs(registry);
   extensions::ExtensionSettingsHandler::RegisterProfilePrefs(registry);
   extensions::TabsCaptureVisibleTabFunction::RegisterProfilePrefs(registry);
   first_run::RegisterProfilePrefs(registry);
   gcm::GCMChannelStatusSyncer::RegisterProfilePrefs(registry);
   NewTabUI::RegisterProfilePrefs(registry);
   PepperFlashSettingsManager::RegisterProfilePrefs(registry);
   PinnedTabCodec::RegisterProfilePrefs(registry);
   signin::RegisterProfilePrefs(registry);
 #endif
@@ skipping 124 matching lines @@
   profile_prefs->ClearPref(kOverscrollVerticalThresholdComplete);
   profile_prefs->ClearPref(kOverscrollMinimumThresholdStart);
   profile_prefs->ClearPref(kOverscrollMinimumThresholdStartTouchpad);
   profile_prefs->ClearPref(kOverscrollVerticalThresholdStart);
   profile_prefs->ClearPref(kOverscrollHorizontalResistThreshold);
   profile_prefs->ClearPref(kOverscrollVerticalResistThreshold);
 #endif  // defined(USE_AURA)
 }
 
 }  // namespace chrome