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/bitrate_controller/bitrate_controller_impl.h

@@ -54,7 +54,6 @@ class BitrateControllerImpl : public BitrateController {
                      int min_bitrate_bps,
                      int max_bitrate_bps) override;
 
-
   void SetReservedBitrate(uint32_t reserved_bitrate_bps) override;
 
   // Returns true if the parameters have changed since the last call.