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/modules/audio_coding/acm2/acm_resampler.cc b/modules/audio_coding/acm2/acm_resampler.cc
index b97ced2..c0b2064 100644
--- a/modules/audio_coding/acm2/acm_resampler.cc
+++ b/modules/audio_coding/acm2/acm_resampler.cc
@@ -19,11 +19,9 @@
 namespace webrtc {
 namespace acm2 {
 
-ACMResampler::ACMResampler() {
-}
+ACMResampler::ACMResampler() {}
 
-ACMResampler::~ACMResampler() {
-}
+ACMResampler::~ACMResampler() {}
 
 int ACMResampler::Resample10Msec(const int16_t* in_audio,
                                  int in_freq_hz,