Safe media metadata parser: create mojo client with MakeUnique<>

chrome/browser/media_galleries/fileapi/safe_media_metadata_parser.cc

 // Copyright 2014 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/browser/media_galleries/fileapi/safe_media_metadata_parser.h"
 
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/extensions/blob_reader.h"
@@ skipping 48 matching lines @@
   content::BrowserThread::PostTask(
       content::BrowserThread::IO, FROM_HERE,
       base::Bind(&SafeMediaMetadataParser::StartOnIOThread, this, callback));
 }
 
 SafeMediaMetadataParser::~SafeMediaMetadataParser() = default;
 
 void SafeMediaMetadataParser::StartOnIOThread(const DoneCallback& callback) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
   DCHECK(!utility_process_mojo_client_);
-  DCHECK(!callback.is_null());
+  DCHECK(callback);
 
   callback_ = callback;
 
-  const base::string16 utility_process_name =
-      l10n_util::GetStringUTF16(IDS_UTILITY_PROCESS_MEDIA_FILE_CHECKER_NAME);
-
-  utility_process_mojo_client_.reset(
-      new content::UtilityProcessMojoClient<extensions::mojom::MediaParser>(
-          utility_process_name));
+  utility_process_mojo_client_ = base::MakeUnique<
+      content::UtilityProcessMojoClient<extensions::mojom::MediaParser>>(
+      l10n_util::GetStringUTF16(IDS_UTILITY_PROCESS_MEDIA_FILE_CHECKER_NAME));
   utility_process_mojo_client_->set_error_callback(
       base::Bind(&SafeMediaMetadataParser::ParseMediaMetadataFailed, this));
 
   utility_process_mojo_client_->Start();  // Start the utility process.
 
   extensions::mojom::MediaDataSourcePtr source;
   media_data_source_ = base::MakeUnique<MediaDataSourceImpl>(this, &source);
 
   utility_process_mojo_client_->service()->ParseMediaMetadata(
       mime_type_, blob_size_, get_attached_images_, std::move(source),
@@ skipping 78 matching lines @@
 void SafeMediaMetadataParser::FinishBlobRequest(
     const extensions::mojom::MediaDataSource::ReadBlobCallback& callback,
     std::unique_ptr<std::string> data) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
 
   if (utility_process_mojo_client_)
     callback.Run(std::vector<uint8_t>(data->begin(), data->end()));
 }
 
 }  // namespace metadata