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}
diff --git a/pc/test/fakeperiodicvideotracksource.h b/pc/test/fakeperiodicvideotracksource.h
index 8cdac0e..ab428d8 100644
--- a/pc/test/fakeperiodicvideotracksource.h
+++ b/pc/test/fakeperiodicvideotracksource.h
@@ -11,8 +11,8 @@
 #ifndef PC_TEST_FAKEPERIODICVIDEOTRACKSOURCE_H_
 #define PC_TEST_FAKEPERIODICVIDEOTRACKSOURCE_H_
 
-#include "pc/videotracksource.h"
 #include "pc/test/fakeperiodicvideosource.h"
+#include "pc/videotracksource.h"
 
 namespace webrtc {