Prepare for building with enable_app_list=0 on Desktop

chrome/browser/prefs/browser_prefs.cc

Index: chrome/browser/prefs/browser_prefs.cc
diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index 9b1e6cd86dd754401c91d22013d21c33cab18cf3..b3a8bf944365a4ca6410b39ed5dd797aa55bbb8f 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -105,7 +105,6 @@
 
 #if defined(ENABLE_EXTENSIONS)
 #include "chrome/browser/accessibility/animation_policy_prefs.h"
-#include "chrome/browser/apps/drive/drive_app_mapping.h"
 #include "chrome/browser/apps/shortcut_manager.h"
 #include "chrome/browser/extensions/activity_log/activity_log.h"
 #include "chrome/browser/extensions/api/commands/command_service.h"
@@ -226,6 +225,10 @@
 #include "chrome/browser/ui/startup/default_browser_prompt.h"
 #endif
 
+#if defined(ENABLE_APP_LIST)
+#include "chrome/browser/apps/drive/drive_app_mapping.h"
+#endif
+
 namespace {
 
 #if defined(OS_WIN)
@@ -504,7 +507,9 @@ void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry) {
   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);