Update //base to chromium 9659b08ea5a34f889dc4166217f438095ddc10d2

base/metrics/field_trial_unittest.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 "base/build_time.h"
 #include "base/message_loop/message_loop.h"
 #include "base/rand_util.h"
 #include "base/run_loop.h"
@@ skipping 1003 matching lines @@
 TEST_F(FieldTrialTest, FloatBoundariesGiveEqualGroupSizes) {
   const int kBucketCount = 100;
 
   // Try each boundary value |i / 100.0| as the entropy value.
   for (int i = 0; i < kBucketCount; ++i) {
     const double entropy = i / static_cast<double>(kBucketCount);
 
     scoped_refptr<base::FieldTrial> trial(
         new base::FieldTrial("test", kBucketCount, "default", entropy));
     for (int j = 0; j < kBucketCount; ++j)
-      trial->AppendGroup(base::StringPrintf("%d", j), 1);
+      trial->AppendGroup(base::IntToString(j), 1);
 
-    EXPECT_EQ(base::StringPrintf("%d", i), trial->group_name());
+    EXPECT_EQ(base::IntToString(i), trial->group_name());
   }
 }
 
 TEST_F(FieldTrialTest, DoesNotSurpassTotalProbability) {
   const double kEntropyValue = 1.0 - 1e-9;
   ASSERT_LT(kEntropyValue, 1.0);
 
   scoped_refptr<base::FieldTrial> trial(
       new base::FieldTrial("test", 2, "default", kEntropyValue));
   trial->AppendGroup("1", 1);
@@ skipping 87 matching lines @@
   // Trying to instantiate a one-time randomized field trial before the
   // FieldTrialList is created should crash.
   EXPECT_DEATH(FieldTrialList::FactoryGetFieldTrial(
       "OneTimeRandomizedTrialWithoutFieldTrialList", 100, kDefaultGroupName,
       base::FieldTrialList::kNoExpirationYear, 1, 1,
       base::FieldTrial::ONE_TIME_RANDOMIZED, NULL), "");
 }
 #endif
 
 }  // namespace base