Bind ContentVerifer::VerifyFailed as OnceCallback.

extensions/browser/content_verify_job.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 "extensions/browser/content_verify_job.h"
 
 #include <algorithm>
 
 #include "base/metrics/histogram_macros.h"
 #include "base/stl_util.h"
@@ skipping 23 matching lines @@
   // destruction.
   base::TimeDelta* total_;
 
   // A timer for how long this object has been alive.
   base::ElapsedTimer timer;
 };
 
 }  // namespace
 
 ContentVerifyJob::ContentVerifyJob(ContentHashReader* hash_reader,
-                                   const FailureCallback& failure_callback)
+                                   FailureCallback failure_callback)
     : done_reading_(false),
       hashes_ready_(false),
       total_bytes_read_(0),
       current_block_(0),
       current_hash_byte_count_(0),
       hash_reader_(hash_reader),
-      failure_callback_(failure_callback),
+      failure_callback_(std::move(failure_callback)),
       failed_(false) {
   // It's ok for this object to be constructed on a different thread from where
   // it's used.
   thread_checker_.DetachFromThread();
 }
 
 ContentVerifyJob::~ContentVerifyJob() {
   UMA_HISTOGRAM_COUNTS("ExtensionContentVerifyJob.TimeSpentUS",
                        time_spent_.InMicroseconds());
 }
@@ skipping 158 matching lines @@
   g_test_observer = observer;
 }
 
 void ContentVerifyJob::DispatchFailureCallback(FailureReason reason) {
   DCHECK(!failed_);
   failed_ = true;
   if (!failure_callback_.is_null()) {
     VLOG(1) << "job failed for " << hash_reader_->extension_id() << " "
             << hash_reader_->relative_path().MaybeAsASCII()
             << " reason:" << reason;
-    failure_callback_.Run(reason);
-    failure_callback_.Reset();
+    std::move(failure_callback_).Run(reason);
   }
   if (g_test_observer) {
     g_test_observer->JobFinished(hash_reader_->extension_id(),
                                  hash_reader_->relative_path(), reason);
   }
 }
 
 }  // namespace extensions