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/video_coding/codecs/h264/h264_decoder_impl.h

@@ -58,8 +58,9 @@ class H264DecoderImpl : public H264Decoder {
   // Called by FFmpeg when it needs a frame buffer to store decoded frames in.
   // The |VideoFrame| returned by FFmpeg at |Decode| originate from here. Their
   // buffers are reference counted and freed by FFmpeg using |AVFreeBuffer2|.
-  static int AVGetBuffer2(
-      AVCodecContext* context, AVFrame* av_frame, int flags);
+  static int AVGetBuffer2(AVCodecContext* context,
+                          AVFrame* av_frame,
+                          int flags);
   // Called by FFmpeg when it is done with a video frame, see |AVGetBuffer2|.
   static void AVFreeBuffer2(void* opaque, uint8_t* data);