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/testsupport/perf_test_unittest.cc

@@ -60,12 +60,9 @@ namespace test {
 
 class PerfTest : public ::testing::Test {
  protected:
-  void TearDown() override {
-    ClearPerfResults();
-  }
+  void TearDown() override { ClearPerfResults(); }
 };
 
-
 #if defined(WEBRTC_IOS)
 #define MAYBE_TestPrintResult DISABLED_TestPrintResult
 #else