Convert implicit scoped_refptr constructor calls to explicit ones, part 1

base/metrics/field_trial_unittest.cc

 // Copyright (c) 2010 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.
 
 // Test of FieldTrial class
 
 #include "base/metrics/field_trial.h"
 
 #include "base/stringprintf.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 82 matching lines @@
 TEST_F(FieldTrialTest, FiftyFiftyProbability) {
   // Check that even with small divisors, we have the proper probabilities, and
   // all outcomes are possible.  Since this is a 50-50 test, it should get both
   // outcomes in a few tries, but we'll try no more than 100 times (and be flaky
   // with probability around 1 in 2^99).
   bool first_winner = false;
   bool second_winner = false;
   int counter = 0;
   do {
     std::string name = base::StringPrintf("FiftyFifty%d", ++counter);
-    scoped_refptr<FieldTrial> trial = new FieldTrial(name, 2);
+    scoped_refptr<FieldTrial> trial(new FieldTrial(name, 2));
     trial->AppendGroup("first", 1);  // 50% chance of being chosen.
     if (trial->group() != FieldTrial::kNotParticipating) {
       first_winner = true;
       continue;
     }
     trial->AppendGroup("second", 1);  // Always chosen at this point.
     EXPECT_NE(FieldTrial::kNotParticipating, trial->group());
     second_winner = true;
   } while ((!second_winner || !first_winner) && counter < 100);
   EXPECT_TRUE(second_winner);
@@ skipping 110 matching lines @@
 }
 
 TEST_F(FieldTrialTest, MakeName) {
   FieldTrial* trial = new FieldTrial("Field Trial", 10);
   trial->AppendGroup("Winner", 10);
   EXPECT_EQ("Histogram_Winner",
             FieldTrial::MakeName("Histogram", "Field Trial"));
 }
 
 }  // namespace base