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/rtc_base/arraysize.h b/rtc_base/arraysize.h
index f7845b5..bf8e6d8 100644
--- a/rtc_base/arraysize.h
+++ b/rtc_base/arraysize.h
@@ -24,7 +24,8 @@
 // This template function declaration is used in defining arraysize.
 // Note that the function doesn't need an implementation, as we only
 // use its type.
-template <typename T, size_t N> char (&ArraySizeHelper(T (&array)[N]))[N];
+template <typename T, size_t N>
+char (&ArraySizeHelper(T (&array)[N]))[N];
 
 #define arraysize(array) (sizeof(ArraySizeHelper(array)))