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}

rtc_base/nullsocketserver_unittest.cc

@@ -15,9 +15,7 @@ namespace rtc {
 
 static const uint32_t kTimeout = 5000U;
 
-class NullSocketServerTest
-    : public testing::Test,
-      public MessageHandler {
+class NullSocketServerTest : public testing::Test, public MessageHandler {
  protected:
   void OnMessage(Message* message) override { ss_.WakeUp(); }