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}

examples/objc/AppRTCMobile/ARDWebSocketChannel.h

@@ -21,8 +21,7 @@
 
 // Registers with the WebSocket server for the given room and client id once
 // the web socket connection is open.
-- (void)registerForRoomId:(NSString *)roomId
-                 clientId:(NSString *)clientId;
+- (void)registerForRoomId:(NSString *)roomId clientId:(NSString *)clientId;
 
 // Sends message over the WebSocket connection if registered, otherwise POSTs to
 // the web socket server instead.