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}

sdk/objc/Framework/Classes/PeerConnection/RTCMetricsSampleInfo+Private.h

@@ -20,8 +20,7 @@ NS_ASSUME_NONNULL_BEGIN
 @interface RTCMetricsSampleInfo ()
 
 /** Initialize an RTCMetricsSampleInfo object from native SampleInfo. */
-- (instancetype)initWithNativeSampleInfo:
-    (const webrtc::metrics::SampleInfo &)info;
+- (instancetype)initWithNativeSampleInfo:(const webrtc::metrics::SampleInfo &)info;
 
 @end