[Chromecast] Remove usage of nonreentrant functions.

chromecast/crash/linux/crash_testing_utils.cc

 // Copyright 2015 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 "chromecast/crash/linux/crash_testing_utils.h"
 
 #include <utility>
 
 #include "base/files/file_util.h"
 #include "base/memory/ptr_util.h"
@@ skipping 125 matching lines @@
     if (!(contents = ParseLockFile(lockfile_path))) {
       return false;
     }
   }
 
   contents->Append(dump.GetAsValue());
 
   return WriteLockFile(lockfile_path, contents.get()) == 0;
 }
 
-bool SetRatelimitPeriodStart(const std::string& metadata_path, time_t start) {
+bool SetRatelimitPeriodStart(const std::string& metadata_path,
+                             const base::Time& start) {
   std::unique_ptr<base::Value> contents = ParseMetadataFile(metadata_path);
 
   base::DictionaryValue* dict;
   base::DictionaryValue* ratelimit_params;
   if (!contents || !contents->GetAsDictionary(&dict) ||
       !dict->GetDictionary(kRatelimitKey, &ratelimit_params)) {
     return false;
   }
 
-  std::string period_start_str =
-      base::StringPrintf("%lld", static_cast<long long>(start));
-  ratelimit_params->SetString(kRatelimitPeriodStartKey, period_start_str);
-
+  ratelimit_params->SetDouble(kRatelimitPeriodStartKey, start.ToDoubleT());
   return WriteMetadataFile(metadata_path, contents.get()) == 0;
 }
 
 }  // namespace chromecast