Fix narrowing warning in battor_sample_converter_unittest

tools/battor_agent/battor_sample_converter_unittest.cc

 // Copyright 2016 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 "tools/battor_agent/battor_sample_converter.h"
 
 #include <vector>
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "tools/battor_agent/battor_protocol_types.h"
 
 using namespace testing;
 
 namespace battor {
 
 TEST(BattOrSampleConverterTest, ToSampleSimple) {
   BattOrEEPROM eeprom;
   eeprom.r1 = 1.0f;
   eeprom.r2 = 1.0f;
   eeprom.r3 = 1.0f;
   eeprom.low_gain = 1.0f;
   eeprom.low_gain_correction_offset = 0.0f;
   eeprom.low_gain_correction_factor = 1.0f;
   eeprom.sd_sample_rate = 1000;
 
   // Create a calibration frame with a baseline voltage and current of zero.
   std::vector<RawBattOrSample> calibration_frame;
-  calibration_frame.push_back(RawBattOrSample{0.0, 0.0});
+  calibration_frame.push_back(RawBattOrSample{0, 0});
   BattOrSampleConverter converter(eeprom, calibration_frame);
 
   // Set both the voltage and current to their max values.
   RawBattOrSample raw_one{2048, 2048};
   BattOrSample one = converter.ToSample(raw_one, 0);
 
   ASSERT_DOUBLE_EQ(0, one.time_ms);
   ASSERT_DOUBLE_EQ(2401.172447484123, one.voltage_mV);
   ASSERT_DOUBLE_EQ(1200.5862237420615, one.current_mA);
 }
@@ skipping 113 matching lines @@
   BattOrSample one = converter.ToSample(RawBattOrSample{0, 0}, 0);
   BattOrSample two = converter.ToSample(RawBattOrSample{0, 0}, 1);
   BattOrSample three = converter.ToSample(RawBattOrSample{0, 0}, 2);
 
   ASSERT_DOUBLE_EQ(0, one.time_ms);
   ASSERT_DOUBLE_EQ(20, two.time_ms);
   ASSERT_DOUBLE_EQ(40, three.time_ms);
 }
 
 }  // namespace battor