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_processing/transient/wpd_tree.h

@@ -47,9 +47,7 @@ class WPDTree {
   ~WPDTree();
 
   // Returns the number of nodes at any given level.
-  static int NumberOfNodesAtLevel(int level) {
-    return 1 << level;
-  }
+  static int NumberOfNodesAtLevel(int level) { return 1 << level; }
 
   // Returns a pointer to the node at the given level and index(of that level).
   // Level goes from 0 to levels().