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/frame_analyzer/reference_less_video_analysis.cc

@@ -17,8 +17,10 @@
 int main(int argc, char* argv[]) {
   // This captures the freezing metrics for reference less video analysis.
   std::string program_name = argv[0];
-  std::string usage = "Outputs the freezing score by comparing current frame "
-      "with the previous frame.\nExample usage:\n" + program_name +
+  std::string usage =
+      "Outputs the freezing score by comparing current frame "
+      "with the previous frame.\nExample usage:\n" +
+      program_name +
       " --video_file=video_file.y4m\n"
       "Command line flags:\n"
       "  - video_file(string): Path of the video "