Convert //chrome/browser/extensions from scoped_ptr to std::unique_ptr

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 78e047a82ba4bb0f5c34cbbb252bb96d682a7161..74694c5793db7bd7d588b8b872f53a924908d9d0 100644
--- a/chrome/browser/extensions/extension_assets_manager_chromeos.cc
+++ b/chrome/browser/extensions/extension_assets_manager_chromeos.cc
@@ -548,7 +548,7 @@ bool ExtensionAssetsManagerChromeOS::CleanUpExtension(
         if (!extension_prefs || extension_prefs->pref_service()->ReadOnly())
           return false;
 
-        scoped_ptr<ExtensionInfo> info =
+        std::unique_ptr<ExtensionInfo> info =
             extension_prefs->GetInstalledExtensionInfo(id);
         if (!info || info->extension_path != base::FilePath(shared_path)) {
           info = extension_prefs->GetDelayedInstallInfo(id);