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/Headers/WebRTC/RTCDataChannel.h

@@ -34,7 +34,6 @@ RTC_EXPORT
 
 @end
 
-
 @class RTCDataChannel;
 RTC_EXPORT
 @protocol RTCDataChannelDelegate <NSObject>
@@ -48,12 +47,10 @@ RTC_EXPORT
 
 @optional
 /** The data channel's |bufferedAmount| changed. */
-- (void)dataChannel:(RTCDataChannel *)dataChannel
-    didChangeBufferedAmount:(uint64_t)amount;
+- (void)dataChannel:(RTCDataChannel *)dataChannel didChangeBufferedAmount:(uint64_t)amount;
 
 @end
 
-
 /** Represents the state of the data channel. */
 typedef NS_ENUM(NSInteger, RTCDataChannelState) {
   RTCDataChannelStateConnecting,
@@ -78,8 +75,7 @@ RTC_EXPORT
 @property(nonatomic, readonly) BOOL isOrdered;
 
 /** Deprecated. Use maxPacketLifeTime. */
-@property(nonatomic, readonly) NSUInteger maxRetransmitTime
-    DEPRECATED_ATTRIBUTE;
+@property(nonatomic, readonly) NSUInteger maxRetransmitTime DEPRECATED_ATTRIBUTE;
 
 /**
  * The length of the time window (in milliseconds) during which transmissions