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/RTCVideoSource+Private.h

@@ -22,17 +22,16 @@ NS_ASSUME_NONNULL_BEGIN
  * The VideoTrackSourceInterface object passed to this RTCVideoSource during
  * construction.
  */
-@property(nonatomic, readonly)
-    rtc::scoped_refptr<webrtc::VideoTrackSourceInterface>
-        nativeVideoSource;
+@property(nonatomic, readonly) rtc::scoped_refptr<webrtc::VideoTrackSourceInterface>
+    nativeVideoSource;
 
 /** Initialize an RTCVideoSource from a native VideoTrackSourceInterface. */
 - (instancetype)initWithNativeVideoSource:
-    (rtc::scoped_refptr<webrtc::VideoTrackSourceInterface>)nativeVideoSource
+        (rtc::scoped_refptr<webrtc::VideoTrackSourceInterface>)nativeVideoSource
     NS_DESIGNATED_INITIALIZER;
 
 - (instancetype)initWithNativeMediaSource:
-    (rtc::scoped_refptr<webrtc::MediaSourceInterface>)nativeMediaSource
+                    (rtc::scoped_refptr<webrtc::MediaSourceInterface>)nativeMediaSource
                                      type:(RTCMediaSourceType)type NS_UNAVAILABLE;
 
 - (instancetype)initWithSignalingThread:(rtc::Thread *)signalingThread