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/ARDRoomServerClient.h

@@ -18,14 +18,12 @@
 
 - (void)joinRoomWithRoomId:(NSString *)roomId
                 isLoopback:(BOOL)isLoopback
-         completionHandler:(void (^)(ARDJoinResponse *response,
-                                     NSError *error))completionHandler;
+         completionHandler:(void (^)(ARDJoinResponse *response, NSError *error))completionHandler;
 
 - (void)sendMessage:(ARDSignalingMessage *)message
             forRoomId:(NSString *)roomId
              clientId:(NSString *)clientId
-    completionHandler:(void (^)(ARDMessageResponse *response,
-                                NSError *error))completionHandler;
+    completionHandler:(void (^)(ARDMessageResponse *response, NSError *error))completionHandler;
 
 - (void)leaveRoomWithRoomId:(NSString *)roomId
                    clientId:(NSString *)clientId