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}

api/dtmfsenderinterface.h

@@ -67,7 +67,8 @@ class DtmfSenderInterface : public rtc::RefCountInterface {
   // If InsertDtmf is called on the same object while an existing task for this
   // object to generate DTMF is still running, the previous task is canceled.
   // Returns true on success and false on failure.
-  virtual bool InsertDtmf(const std::string& tones, int duration,
+  virtual bool InsertDtmf(const std::string& tones,
+                          int duration,
                           int inter_tone_gap) = 0;
 
   // Returns the track given as argument to the constructor. Only exists for