Reformat the WebRTC code base

Running clang-format with chromium's style guide.

The goal is n-fold:
 * providing consistency and readability (that's what code guidelines are for)
 * preventing noise with presubmit checks and git cl format
 * building on the previous point: making it easier to automatically fix format issues
 * you name it

Please consider using git-hyper-blame to ignore this commit.

Bug: webrtc:9340
Change-Id: I694567c4cdf8cee2860958cfe82bfaf25848bb87
Reviewed-on: https://webrtc-review.googlesource.com/81185
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23660}

modules/video_coding/codecs/multiplex/multiplex_decoder_adapter.cc

@@ -126,8 +126,8 @@ int32_t MultiplexDecoderAdapter::Decode(
   int32_t rv = 0;
   for (size_t i = 0; i < image.image_components.size(); i++) {
     rv = decoders_[image.image_components[i].component_index]->Decode(
-        image.image_components[i].encoded_image, missing_frames,
-        nullptr, render_time_ms);
+        image.image_components[i].encoded_image, missing_frames, nullptr,
+        render_time_ms);
     if (rv != WEBRTC_VIDEO_CODEC_OK)
       return rv;
   }