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

chrome/browser/ui/webui/options/chromeos/power_handler.cc

Index: chrome/browser/ui/webui/options/chromeos/power_handler.cc
diff --git a/chrome/browser/ui/webui/options/chromeos/power_handler.cc b/chrome/browser/ui/webui/options/chromeos/power_handler.cc
index 9aeb06f9018dd65777a58089d0a422fe7b853ae3..5883309d6c469751fc7f9c19bc8a7f097ae7e683 100644
--- a/chrome/browser/ui/webui/options/chromeos/power_handler.cc
+++ b/chrome/browser/ui/webui/options/chromeos/power_handler.cc
@@ -150,7 +150,7 @@ void PowerHandler::UpdatePowerSources() {
 
   base::ListValue sources_list;
   for (const auto& source : status->GetPowerSources()) {
-    scoped_ptr<base::DictionaryValue> dict(new base::DictionaryValue());
+    std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue());
     dict->SetString("id", source.id);
     dict->SetInteger("type", source.type);
     dict->SetString("description",