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}
diff --git a/modules/video_coding/rtp_frame_reference_finder.cc b/modules/video_coding/rtp_frame_reference_finder.cc
index 9401243..396935c 100644
--- a/modules/video_coding/rtp_frame_reference_finder.cc
+++ b/modules/video_coding/rtp_frame_reference_finder.cc
@@ -572,7 +572,7 @@
 
     last_picture_id = Add<kPicIdLength>(last_picture_id, 1);
     while (last_picture_id != picture_id) {
-      gof_idx = (gof_idx  + 1) % gof_size;
+      gof_idx = (gof_idx + 1) % gof_size;
       RTC_CHECK(gof_idx < kMaxVp9FramesInGof);
 
       size_t temporal_idx = info->gof->temporal_idx[gof_idx];