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}

test/frame_utils.h

@@ -40,7 +40,7 @@ bool FramesEqual(const webrtc::VideoFrame& f1, const webrtc::VideoFrame& f2);
 bool FrameBufsEqual(const rtc::scoped_refptr<webrtc::VideoFrameBuffer>& f1,
                     const rtc::scoped_refptr<webrtc::VideoFrameBuffer>& f2);
 
-rtc::scoped_refptr<I420Buffer> ReadI420Buffer(int width, int height, FILE *);
+rtc::scoped_refptr<I420Buffer> ReadI420Buffer(int width, int height, FILE*);
 
 }  // namespace test
 }  // namespace webrtc