Use std::unique_ptr<base::Value> in V8ValueConverter.

content/renderer/gpu/gpu_benchmarking_extension.cc

 // Copyright (c) 2012 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 "content/renderer/gpu/gpu_benchmarking_extension.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <utility>
@@ skipping 892 matching lines @@
 
   scoped_refptr<CallbackAndContext> callback_and_context =
       new CallbackAndContext(args->isolate(),
                              callback,
                              context.web_frame()->mainWorldScriptContext());
 
   std::unique_ptr<V8ValueConverter> converter =
       base::WrapUnique(V8ValueConverter::create());
   v8::Local<v8::Context> v8_context = callback_and_context->GetContext();
   std::unique_ptr<base::Value> value =
-      base::WrapUnique(converter->FromV8Value(arguments, v8_context));
+      converter->FromV8Value(arguments, v8_context);
 
   return context.compositor()->ScheduleMicroBenchmark(
       name, std::move(value),
       base::Bind(&OnMicroBenchmarkCompleted,
                  base::RetainedRef(callback_and_context)));
 }
 
 bool GpuBenchmarking::SendMessageToMicroBenchmark(
     int id,
     v8::Local<v8::Object> message) {
   GpuBenchmarkingContext context;
   if (!context.Init(true))
     return false;
 
   std::unique_ptr<V8ValueConverter> converter =
       base::WrapUnique(V8ValueConverter::create());
   v8::Local<v8::Context> v8_context =
       context.web_frame()->mainWorldScriptContext();
   std::unique_ptr<base::Value> value =
-      base::WrapUnique(converter->FromV8Value(message, v8_context));
+      converter->FromV8Value(message, v8_context);
 
   return context.compositor()->SendMessageToMicroBenchmark(id,
                                                            std::move(value));
 }
 
 bool GpuBenchmarking::HasGpuChannel() {
   gpu::GpuChannelHost* gpu_channel =
       RenderThreadImpl::current()->GetGpuChannel();
   return !!gpu_channel;
 }
@@ skipping 15 matching lines @@
           &gpu_driver_bug_workarounds))) {
     return;
   }
 
   v8::Local<v8::Value> result;
   if (gin::TryConvertToV8(args->isolate(), gpu_driver_bug_workarounds, &result))
     args->Return(result);
 }
 
 }  // namespace content