CreateTrailsFromString function now accepts argument without last separator symbol

base/metrics/field_trial.cc

 // Copyright (c) 2012 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 <algorithm>
 
 #include "base/build_time.h"
 #include "base/logging.h"
@@ skipping 396 matching lines @@
   if (trials_string.empty() || !global_)
     return true;
 
   size_t next_item = 0;
   while (next_item < trials_string.length()) {
     size_t name_end = trials_string.find(kPersistentStringSeparator, next_item);
     if (name_end == trials_string.npos || next_item == name_end)
       return false;
     size_t group_name_end = trials_string.find(kPersistentStringSeparator,
                                                name_end + 1);
-    if (group_name_end == trials_string.npos || name_end + 1 == group_name_end)
+    if (name_end + 1 == group_name_end)
       return false;
+    if (group_name_end == trials_string.npos)
+      group_name_end = trials_string.length();
     std::string name(trials_string, next_item, name_end - next_item);
     std::string group_name(trials_string, name_end + 1,
                            group_name_end - name_end - 1);
     next_item = group_name_end + 1;
 
     if (ignored_trial_names.find(name) != ignored_trial_names.end())
       continue;
 
     FieldTrial* trial = CreateFieldTrial(name, group_name);
     if (!trial)
@@ skipping 102 matching lines @@
     return;
   }
   AutoLock auto_lock(global_->lock_);
   DCHECK(!global_->PreLockedFind(trial->trial_name()));
   trial->AddRef();
   trial->SetTrialRegistered();
   global_->registered_[trial->trial_name()] = trial;
 }
 
 }  // namespace base