Switch SupportsUserData uses to use unique_ptr.

extensions/renderer/api_event_handler.cc

 // Copyright 2016 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 "extensions/renderer/api_event_handler.h"
 
 #include <algorithm>
 #include <map>
 #include <memory>
 #include <vector>
@@ skipping 52 matching lines @@
   if (!per_context_data)
     return nullptr;
   auto* data = static_cast<APIEventPerContextData*>(
       per_context_data->GetUserData(kExtensionAPIEventPerContextKey));
 
   if (!data && should_create) {
     auto api_data =
         base::MakeUnique<APIEventPerContextData>(context->GetIsolate());
     data = api_data.get();
     per_context_data->SetUserData(kExtensionAPIEventPerContextKey,
-                                  api_data.release());
+                                  std::move(api_data));
   }
 
   return data;
 }
 
 void DispatchEvent(const v8::FunctionCallbackInfo<v8::Value>& info) {
   v8::Isolate* isolate = info.GetIsolate();
   v8::HandleScope handle_scope(isolate);
   if (info.Length() != 1 || !info[0]->IsArray()) {
     NOTREACHED();
@@ skipping 217 matching lines @@
   auto iter = data->emitters.find(event_name);
   DCHECK(iter != data->emitters.end());
   EventEmitter* emitter = nullptr;
   gin::Converter<EventEmitter*>::FromV8(
       context->GetIsolate(), iter->second.Get(context->GetIsolate()), &emitter);
   CHECK(emitter);
   return emitter->GetNumListeners();
 }
 
 }  // namespace extensions