clang: Turn on -Wabsolute-value.

media/cast/audio_sender/audio_encoder_unittest.cc

Index: media/cast/audio_sender/audio_encoder_unittest.cc
diff --git a/media/cast/audio_sender/audio_encoder_unittest.cc b/media/cast/audio_sender/audio_encoder_unittest.cc
index f9bc03ecaf8115c99320fea44fc69de95be83d7b..b521099243b5afc5e25cc89264222daae5da175e 100644
--- a/media/cast/audio_sender/audio_encoder_unittest.cc
+++ b/media/cast/audio_sender/audio_encoder_unittest.cc
@@ -123,8 +123,8 @@ class AudioEncoderTest : public ::testing::TestWithParam<TestScenario> {
 
     for (size_t i = 0; i < scenario.num_durations; ++i) {
       const bool simulate_missing_data = scenario.durations_in_ms[i] < 0;
-      const base::TimeDelta duration =
-          base::TimeDelta::FromMilliseconds(abs(scenario.durations_in_ms[i]));
+      const base::TimeDelta duration = base::TimeDelta::FromMilliseconds(
+          std::abs(scenario.durations_in_ms[i]));
       receiver_->SetCaptureTimeBounds(
           testing_clock_->NowTicks() - frame_duration,
           testing_clock_->NowTicks() + duration);