Revert r83048 "Removed wchar_t from Time::FromString."

base/metrics/field_trial.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 "base/metrics/field_trial.h"
 
 #include "base/logging.h"
 #include "base/rand_util.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
@@ skipping 103 matching lines @@
   DCHECK_EQ(0u, FieldTrialList::GetFieldTrialCount());
   enable_benchmarking_ = true;
 }
 
 FieldTrial::~FieldTrial() {}
 
 // static
 Time FieldTrial::GetBuildTime() {
   Time integral_build_time;
   const char* kDateTime = __DATE__ " " __TIME__;
-  bool result = Time::FromString(kDateTime, &integral_build_time);
+  bool result = Time::FromString(ASCIIToWide(kDateTime).c_str(),
+                                 &integral_build_time);
   DCHECK(result);
   return integral_build_time;
 }
 
 //------------------------------------------------------------------------------
 // FieldTrialList methods and members.
 
 // static
 FieldTrialList* FieldTrialList::global_ = NULL;
 
@@ skipping 128 matching lines @@
 }
 
 FieldTrial* FieldTrialList::PreLockedFind(const std::string& name) {
   RegistrationList::iterator it = registered_.find(name);
   if (registered_.end() == it)
     return NULL;
   return it->second;
 }
 
 }  // namespace base