Log video toolbox error codes

Log OSStatus returned by VideoToolbox to simplify debugging.

Bug: webrtc:9134
Change-Id: Ib9e4f208a823d4be58324dd1f9dde833cba8afbe
Reviewed-on: https://webrtc-review.googlesource.com/69080
Reviewed-by: Kári Helgason <kthelgason@webrtc.org>
Commit-Queue: Kári Helgason <kthelgason@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22823}
diff --git a/sdk/objc/Framework/Classes/VideoToolbox/RTCVideoDecoderH264.mm b/sdk/objc/Framework/Classes/VideoToolbox/RTCVideoDecoderH264.mm
index 8460228..859bf03 100644
--- a/sdk/objc/Framework/Classes/VideoToolbox/RTCVideoDecoderH264.mm
+++ b/sdk/objc/Framework/Classes/VideoToolbox/RTCVideoDecoderH264.mm
@@ -242,6 +242,7 @@
       nullptr, _videoFormat, nullptr, attributes, &record, &_decompressionSession);
   CFRelease(attributes);
   if (status != noErr) {
+    RTC_LOG(LS_ERROR) << "Failed to create decompression session: " << status;
     [self destroyDecompressionSession];
     return WEBRTC_VIDEO_CODEC_ERROR;
   }