Remove base's ALIGNOF/ALIGNAS in favor of alignof/alignas.

content/browser/renderer_host/media/audio_input_sync_writer_unittest.cc

Index: content/browser/renderer_host/media/audio_input_sync_writer_unittest.cc
diff --git a/content/browser/renderer_host/media/audio_input_sync_writer_unittest.cc b/content/browser/renderer_host/media/audio_input_sync_writer_unittest.cc
index 6cd049002305fb9e8c9f03e8e67328e363fab891..cab8ecde661c7bd5cc1f6299984f4ae89403980b 100644
--- a/content/browser/renderer_host/media/audio_input_sync_writer_unittest.cc
+++ b/content/browser/renderer_host/media/audio_input_sync_writer_unittest.cc
@@ -43,9 +43,10 @@ const int bits_per_sample = 16;
 #define DATA_ALIGNMENT 16
 static_assert(AudioBus::kChannelAlignment == DATA_ALIGNMENT,
               "Data alignment not same as AudioBus");
-ALIGNAS(DATA_ALIGNMENT)
-uint8_t data[kSegments * (sizeof(media::AudioInputBufferParameters) +
-                          frames * channels * sizeof(float))];
+alignas(
+    DATA_ALIGNMENT) uint8_t data[kSegments *
+                                 (sizeof(media::AudioInputBufferParameters) +
+                                  frames * channels * sizeof(float))];
 
 }  // namespace