Convert //sync from scoped_ptr to std::unique_ptr

sync/test/mock_invalidation_tracker.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 "sync/test/mock_invalidation_tracker.h"
 
 #include <stdint.h>
 
 #include "base/logging.h"
 #include "sync/test/trackable_mock_invalidation.h"
 
 namespace syncer {
 
-scoped_ptr<TrackableMockInvalidation>
+std::unique_ptr<TrackableMockInvalidation>
 MockInvalidationTracker::IssueUnknownVersionInvalidation() {
-  return scoped_ptr<TrackableMockInvalidation>(
+  return std::unique_ptr<TrackableMockInvalidation>(
       new TrackableMockInvalidation(true, -1, std::string(), this, next_id_++));
 }
 
-scoped_ptr<TrackableMockInvalidation>
+std::unique_ptr<TrackableMockInvalidation>
 MockInvalidationTracker::IssueInvalidation(int64_t version,
                                            const std::string& payload) {
-  return scoped_ptr<TrackableMockInvalidation>(
+  return std::unique_ptr<TrackableMockInvalidation>(
       new TrackableMockInvalidation(false, version, payload, this, next_id_++));
 }
 
 MockInvalidationTracker::MockInvalidationTracker() : next_id_(0) {
 }
 
 MockInvalidationTracker::~MockInvalidationTracker() {
 }
 
 void MockInvalidationTracker::Acknowledge(int invalidation_id) {
@@ skipping 22 matching lines @@
 bool MockInvalidationTracker::AllInvalidationsAccountedFor() const {
   for (int i = 0; i < next_id_; ++i) {
     if (IsUnacked(i)) {
       return false;
     }
   }
   return true;
 }
 
 }  // namespace syncer