Remove OS_CHROMEOS from ui/ash code

chrome/browser/ui/ash/app_sync_ui_state.cc

Index: chrome/browser/ui/ash/app_sync_ui_state.cc
diff --git a/chrome/browser/ui/ash/app_sync_ui_state.cc b/chrome/browser/ui/ash/app_sync_ui_state.cc
index f7c65e86448822de75201c5e1794bdd6659ae340..3d4cca3190c4d33bb715853dd749780c24ecf147 100644
--- a/chrome/browser/ui/ash/app_sync_ui_state.cc
+++ b/chrome/browser/ui/ash/app_sync_ui_state.cc
@@ -13,13 +13,10 @@
 #include "chrome/browser/ui/ash/app_sync_ui_state_observer.h"
 #include "components/browser_sync/browser/profile_sync_service.h"
 #include "components/prefs/pref_service.h"
+#include "components/user_manager/user_manager.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/extension_system.h"
 
-#if defined(OS_CHROMEOS)
-#include "components/user_manager/user_manager.h"
-#endif
-
 namespace {
 
 // Max loading animation time in milliseconds.
@@ -34,7 +31,6 @@ AppSyncUIState* AppSyncUIState::Get(Profile* profile) {
 
 // static
 bool AppSyncUIState::ShouldObserveAppSyncForProfile(Profile* profile) {
-#if defined(OS_CHROMEOS)
   if (user_manager::UserManager::Get()->IsLoggedInAsGuest())
     return false;
 
@@ -45,9 +41,6 @@ bool AppSyncUIState::ShouldObserveAppSyncForProfile(Profile* profile) {
     return false;
 
   return profile->IsNewProfile();
-#else
-  return false;
-#endif
 }
 
 AppSyncUIState::AppSyncUIState(Profile* profile)