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}

common_audio/signal_processing/include/real_fft.h

@@ -15,7 +15,7 @@
 
 // For ComplexFFT(), the maximum fft order is 10;
 // WebRTC APM uses orders of only 7 and 8.
-enum {kMaxFFTOrder = 10};
+enum { kMaxFFTOrder = 10 };
 
 struct RealFFT;