Make the toggle touchscreen/touchpad shortcuts apply per-user

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 571b0ed110393f2a362997c310f2c47d550cdfaf..b415e30a99f2b50cab9727c73d63cae30d5b3085 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -425,7 +425,6 @@ void RegisterLocalState(PrefRegistrySimple* registry) {
   chromeos::SigninScreenHandler::RegisterPrefs(registry);
   chromeos::StartupUtils::RegisterPrefs(registry);
   chromeos::system::AutomaticRebootManager::RegisterPrefs(registry);
-  chromeos::system::InputDeviceSettings::RegisterPrefs(registry);

[gab, 2016/11/07 21:47:13]

Cleanup unused state in MigrateObsoleteBrowserPrefs() below -- see paradigm used
in MigrateObsoleteProfilePrefs() 

[afakhry, 2016/11/08 21:30:37]

Done.

   chromeos::TimeZoneResolver::RegisterPrefs(registry);
   chromeos::UserImageManager::RegisterPrefs(registry);
   chromeos::UserSessionManager::RegisterPrefs(registry);
@@ -598,6 +597,7 @@ void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry) {
   chromeos::PrinterPrefManager::RegisterProfilePrefs(registry);
   chromeos::SAMLOfflineSigninLimiter::RegisterProfilePrefs(registry);
   chromeos::ServicesCustomizationDocument::RegisterProfilePrefs(registry);
+  chromeos::system::InputDeviceSettings::RegisterProfilePrefs(registry);
   chromeos::UserImageSyncObserver::RegisterProfilePrefs(registry);
   extensions::EPKPChallengeUserKey::RegisterProfilePrefs(registry);
   flags_ui::PrefServiceFlagsStorage::RegisterProfilePrefs(registry);