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}

modules/audio_coding/neteq/sync_buffer.h

@@ -92,7 +92,7 @@ class SyncBuffer : public AudioMultiVector {
  private:
   size_t next_index_;
   uint32_t end_timestamp_;  // The timestamp of the last sample in the buffer.
-  size_t dtmf_index_;  // Index to the first non-DTMF sample in the buffer.
+  size_t dtmf_index_;       // Index to the first non-DTMF sample in the buffer.
 
   RTC_DISALLOW_COPY_AND_ASSIGN(SyncBuffer);
 };