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/cpu_time.cc b/rtc_base/cpu_time.cc
index 6c22880..f25b506 100644
--- a/rtc_base/cpu_time.cc
+++ b/rtc_base/cpu_time.cc
@@ -15,12 +15,12 @@
 #if defined(WEBRTC_LINUX)
 #include <time.h>
 #elif defined(WEBRTC_MAC)
-#include <sys/resource.h>
-#include <sys/types.h>
-#include <sys/times.h>
-#include <mach/thread_info.h>
-#include <mach/thread_act.h>
 #include <mach/mach_init.h>
+#include <mach/thread_act.h>
+#include <mach/thread_info.h>
+#include <sys/resource.h>
+#include <sys/times.h>
+#include <sys/types.h>
 #include <unistd.h>
 #elif defined(WEBRTC_WIN)
 #include <windows.h>