Replace chromeos::UserManager::Get() with chromeos::GetUserManager().

chrome/browser/extensions/extension_assets_manager_chromeos.cc

Index: chrome/browser/extensions/extension_assets_manager_chromeos.cc
diff --git a/chrome/browser/extensions/extension_assets_manager_chromeos.cc b/chrome/browser/extensions/extension_assets_manager_chromeos.cc
index aa16ac8c2b748bbe46dc204f5039d5d35d53c1e6..3c2af83467f14fa09e15b2b2223f008fe99546d7 100644
--- a/chrome/browser/extensions/extension_assets_manager_chromeos.cc
+++ b/chrome/browser/extensions/extension_assets_manager_chromeos.cc
@@ -281,7 +281,7 @@ void ExtensionAssetsManagerChromeOS::CheckSharedExtension(
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   const std::string& user_id = profile->GetProfileName();
-  chromeos::UserManager* user_manager = chromeos::UserManager::Get();
+  chromeos::UserManager* user_manager = chromeos::GetUserManager();
   if (!user_manager) {
     NOTREACHED();
     return;
@@ -497,7 +497,7 @@ bool ExtensionAssetsManagerChromeOS::CleanUpExtension(
     const std::string& id,
     base::DictionaryValue* extension_info,
     std::multimap<std::string, base::FilePath>* live_extension_paths) {
-  chromeos::UserManager* user_manager = chromeos::UserManager::Get();
+  chromeos::UserManager* user_manager = chromeos::GetUserManager();
   if (!user_manager) {
     NOTREACHED();
     return false;