Implement shortcut for finalizing a trial with all remaining probability...

base/field_trial.cc

-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2006-2009 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/field_trial.h"
 #include "base/logging.h"
 #include "base/rand_util.h"
 #include "base/string_util.h"
 
 using base::Time;
@@ skipping 17 matching lines @@
     random_(static_cast<Probability>(divisor_ * base::RandDouble())),
     accumulated_group_probability_(0),
     next_group_number_(0),
     group_(kNotParticipating) {
   FieldTrialList::Register(this);
 }
 
 int FieldTrial::AppendGroup(const std::string& name,
                             Probability group_probability) {
   DCHECK(group_probability <= divisor_);
-  accumulated_group_probability_ += group_probability;
+  DCHECK(group_probability >=0 ||
+         group_probability == kAllRemainingProbability);
+  if (group_probability == kAllRemainingProbability)
+    accumulated_group_probability_ = divisor_;
+  else
+    accumulated_group_probability_ += group_probability;
   DCHECK(accumulated_group_probability_ <= divisor_);
   if (group_ == kNotParticipating && accumulated_group_probability_ > random_) {
-    // This is the group that crossed the random line, so we do teh assignment.
+    // This is the group that crossed the random line, so we do the assignment.
     group_ = next_group_number_;
     if (name.empty())
       StringAppendF(&group_name_, "_%d", group_);
     else
       group_name_ = name;
   }
   return next_group_number_++;
 }
 
 // static
@@ skipping 115 matching lines @@
         return false;
       continue;
     }
     const int kTotalProbability = 100;
     field_trial = new FieldTrial(name, kTotalProbability);
     field_trial->AppendGroup(group_name, kTotalProbability);
   }
   return true;
 }