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}

rtc_tools/event_log_visualizer/main.cc

@@ -157,7 +157,6 @@ DEFINE_bool(normalize_time,
 
 void SetAllPlotFlags(bool setting);
 
-
 int main(int argc, char* argv[]) {
   std::string program_name = argv[0];
   std::string usage =
@@ -381,7 +380,6 @@ int main(int argc, char* argv[]) {
   return 0;
 }
 
-
 void SetAllPlotFlags(bool setting) {
   FLAG_plot_incoming_packet_sizes = setting;
   FLAG_plot_outgoing_packet_sizes = setting;