Convert Pass()→std::move() in //chrome

chrome/browser/supervised_user/experimental/supervised_user_blacklist.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/supervised_user/experimental/supervised_user_blacklist.h"
 
 #include <algorithm>
 #include <cstring>
 #include <fstream>
 
 #include "base/files/file_path.h"
 #include "base/files/memory_mapped_file.h"
 #include "content/public/browser/browser_thread.h"
 #include "url/gurl.h"
 
 using content::BrowserThread;
 
 namespace {
 
 scoped_ptr<std::vector<SupervisedUserBlacklist::Hash> >
 ReadFromBinaryFileOnFileThread(const base::FilePath& path) {
   DCHECK(BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
 
   scoped_ptr<std::vector<SupervisedUserBlacklist::Hash> > host_hashes(
       new std::vector<SupervisedUserBlacklist::Hash>);
 
   base::MemoryMappedFile file;
   file.Initialize(path);
   if (!file.IsValid())
-    return host_hashes.Pass();
+    return host_hashes;
 
   size_t size = file.length();
   if (size <= 0 || size % base::kSHA1Length != 0)
-    return host_hashes.Pass();
+    return host_hashes;
 
   size_t hash_count = size / base::kSHA1Length;
   host_hashes->resize(hash_count);
 
   for (size_t i = 0; i < hash_count; i++) {
     memcpy((*host_hashes.get())[i].data,
            file.data() + i * base::kSHA1Length,
            base::kSHA1Length);
   }
 
   std::sort(host_hashes->begin(), host_hashes->end());
 
-  return host_hashes.Pass();
+  return host_hashes;
 }
 
 } // namespace
 
 SupervisedUserBlacklist::Hash::Hash(const std::string& host) {
   const unsigned char* host_bytes =
       reinterpret_cast<const unsigned char*>(host.c_str());
   base::SHA1HashBytes(host_bytes, host.length(), data);
 }
 
@@ skipping 28 matching lines @@
 
 void SupervisedUserBlacklist::OnReadFromFileCompleted(
     const base::Closure& done_callback,
     scoped_ptr<std::vector<Hash> > host_hashes) {
   host_hashes_.swap(*host_hashes);
   LOG_IF(WARNING, host_hashes_.empty()) << "Got empty blacklist";
 
   if (!done_callback.is_null())
     done_callback.Run();
 }