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/RTCMediaConstraints+Private.h

@@ -20,9 +20,8 @@ class MediaConstraints : public MediaConstraintsInterface {
  public:
   virtual ~MediaConstraints();
   MediaConstraints();
-  MediaConstraints(
-      const MediaConstraintsInterface::Constraints& mandatory,
-      const MediaConstraintsInterface::Constraints& optional);
+  MediaConstraints(const MediaConstraintsInterface::Constraints& mandatory,
+                   const MediaConstraintsInterface::Constraints& optional);
   virtual const Constraints& GetMandatory() const;
   virtual const Constraints& GetOptional() const;
 
@@ -33,7 +32,6 @@ class MediaConstraints : public MediaConstraintsInterface {
 
 }  // namespace webrtc
 
-
 NS_ASSUME_NONNULL_BEGIN
 
 @interface RTCMediaConstraints ()
@@ -45,9 +43,8 @@ NS_ASSUME_NONNULL_BEGIN
 - (std::unique_ptr<webrtc::MediaConstraints>)nativeConstraints;
 
 /** Return a native Constraints object representing these constraints */
-+ (webrtc::MediaConstraintsInterface::Constraints)
-    nativeConstraintsForConstraints:
-        (NSDictionary<NSString *, NSString *> *)constraints;
++ (webrtc::MediaConstraintsInterface::Constraints)nativeConstraintsForConstraints:
+        (NSDictionary<NSString*, NSString*>*)constraints;
 
 @end