Use correct IntToString variants in //chrome

chrome/browser/sync/test/integration/performance/sync_timing_helper.cc

 // Copyright (c) 2011 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/sync/test/integration/performance/sync_timing_helper.h"
 
 #include "base/strings/string_number_conversions.h"
 #include "base/time/time.h"
 #include "chrome/browser/sync/test/integration/profile_sync_service_harness.h"
 #include "chrome/browser/sync/test/integration/sync_integration_test_util.h"
@@ skipping 27 matching lines @@
   base::Time start = base::Time::Now();
   EXPECT_TRUE(ProfileSyncServiceHarness::AwaitQuiescence(clients));
   return base::Time::Now() - start;
 }
 
 // static
 void SyncTimingHelper::PrintResult(const std::string& measurement,
                                    const std::string& trace,
                                    const base::TimeDelta& dt) {
   printf("*RESULT %s: %s= %s ms\n", measurement.c_str(), trace.c_str(),
-         base::IntToString(dt.InMillisecondsF()).c_str());
+         base::Int64ToString(dt.InMilliseconds()).c_str());
 }