Motown: Fix unique_ptrs to arrays so deallocation is done properly

services/media/audio/platform/generic/standard_output_base.cc

Index: services/media/audio/platform/generic/standard_output_base.cc
diff --git a/services/media/audio/platform/generic/standard_output_base.cc b/services/media/audio/platform/generic/standard_output_base.cc
index 09a5324d910d5ab1e7e9367d3d3bbafad8a0fdb6..3142246e8d5c634b6aefd26ac8d12d1834848ea3 100644
--- a/services/media/audio/platform/generic/standard_output_base.cc
+++ b/services/media/audio/platform/generic/standard_output_base.cc
@@ -86,7 +86,7 @@ void StandardOutputBase::Process() {
       DCHECK_LE(cur_mix_job_.buf_frames, mix_buf_frames_);
 
       // Fill the intermediate buffer with silence.
-      size_t bytes_to_zero = sizeof(*mix_buf_)
+      size_t bytes_to_zero = sizeof(int32_t)
                            * cur_mix_job_.buf_frames
                            * output_formatter_->channels();
       ::memset(mix_buf_.get(), 0, bytes_to_zero);