Convert //chrome/browser/extensions from scoped_ptr to std::unique_ptr

chrome/browser/extensions/blob_reader.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/browser/extensions/blob_reader.h"
 
 #include <limits>
 #include <utility>
 
 #include "base/format_macros.h"
@@ skipping 42 matching lines @@
 }
 
 void BlobReader::Start() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   fetcher_->Start();
 }
 
 // Overridden from net::URLFetcherDelegate.
 void BlobReader::OnURLFetchComplete(const net::URLFetcher* source) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
-  scoped_ptr<std::string> response(new std::string);
+  std::unique_ptr<std::string> response(new std::string);
   int64_t first = 0, last = 0, length = 0;
   source->GetResponseAsString(response.get());
   source->GetResponseHeaders()->GetContentRange(&first, &last, &length);
   callback_.Run(std::move(response), length);
 
   delete this;
 }