Convert //components/proximity_auth from scoped_ptr to std::unique_ptr

components/proximity_auth/screenlock_bridge.cc

Index: components/proximity_auth/screenlock_bridge.cc
diff --git a/components/proximity_auth/screenlock_bridge.cc b/components/proximity_auth/screenlock_bridge.cc
index e95a0a70229e489cb194e38067a651f853289a1b..3a9411483f1c9fe4e8cd9648fb0a75ec4a3c0cc2 100644
--- a/components/proximity_auth/screenlock_bridge.cc
+++ b/components/proximity_auth/screenlock_bridge.cc
@@ -61,9 +61,9 @@ ScreenlockBridge::UserPodCustomIconOptions::UserPodCustomIconOptions()
 ScreenlockBridge::UserPodCustomIconOptions::~UserPodCustomIconOptions() {
 }
 
-scoped_ptr<base::DictionaryValue>
+std::unique_ptr<base::DictionaryValue>
 ScreenlockBridge::UserPodCustomIconOptions::ToDictionaryValue() const {
-  scoped_ptr<base::DictionaryValue> result(new base::DictionaryValue());
+  std::unique_ptr<base::DictionaryValue> result(new base::DictionaryValue());
   std::string icon_id = GetIdForIcon(icon_);
   result->SetString("id", icon_id);