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

chrome/renderer/extensions/cast_streaming_native_handler.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 "chrome/renderer/extensions/cast_streaming_native_handler.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 491 matching lines @@
   CHECK_EQ(2, args.Length());
   CHECK(args[0]->IsInt32());
   CHECK(args[1]->IsObject());
 
   const int transport_id = args[0]->ToInt32(args.GetIsolate())->Value();
   CastUdpTransport* transport = GetUdpTransportOrThrow(transport_id);
   if (!transport)
     return;
 
   std::unique_ptr<V8ValueConverter> converter(V8ValueConverter::create());
-  base::Value* options_value =
-      converter->FromV8Value(args[1], context()->v8_context());
-  base::DictionaryValue* options;
-  if (!options_value || !options_value->GetAsDictionary(&options)) {
-    delete options_value;
+  std::unique_ptr<base::DictionaryValue> options = base::DictionaryValue::From(
+      converter->FromV8Value(args[1], context()->v8_context()));
+  if (!options) {
     args.GetIsolate()->ThrowException(v8::Exception::TypeError(
         v8::String::NewFromUtf8(args.GetIsolate(), kUnableToConvertArgs)));
     return;
   }
-  transport->SetOptions(base::WrapUnique(options));
+  transport->SetOptions(std::move(options));
 }
 
 void CastStreamingNativeHandler::ToggleLogging(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   CHECK_EQ(2, args.Length());
   CHECK(args[0]->IsInt32());
   CHECK(args[1]->IsBoolean());
 
   const int stream_id = args[0]->ToInt32(args.GetIsolate())->Value();
   CastRtpStream* stream = GetRtpStreamOrThrow(stream_id);
@@ skipping 347 matching lines @@
     LOG(ERROR) << "Failed to add Cast audio track to media stream.";
   }
   if (!content::AddVideoTrackToMediaStream(std::move(video), true,  // is_remote
                                            true,  // is_readonly
                                            &web_stream)) {
     LOG(ERROR) << "Failed to add Cast video track to media stream.";
   }
 }
 
 }  // namespace extensions