Replace unique_ptr.reset/release with std::move under src/ui

ui/events/event_source.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/events/event_source.h"
 
 #include <algorithm>
 
 #include "ui/events/event_processor.h"
 #include "ui/events/event_rewriter.h"
@@ skipping 44 matching lines @@
   while (status == EVENT_REWRITE_DISPATCH_ANOTHER) {
     std::unique_ptr<Event> new_event;
     status = (*it)->NextDispatchEvent(*rewritten_event, &new_event);
     if (status == EVENT_REWRITE_DISCARD)
       return EventDispatchDetails();
     CHECK_NE(EVENT_REWRITE_CONTINUE, status);
     CHECK(new_event);
     details = DeliverEventToProcessor(new_event.get());
     if (details.dispatcher_destroyed)
       return details;
-    rewritten_event.reset(new_event.release());
+    rewritten_event = std::move(new_event);
   }
   return EventDispatchDetails();
 }
 
 EventDispatchDetails EventSource::DeliverEventToProcessor(Event* event) {
   EventProcessor* processor = GetEventProcessor();
   CHECK(processor);
   return processor->OnEventFromSource(event);
 }
 
 }  // namespace ui