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/datachannelinterface.h

@@ -61,14 +61,10 @@ struct DataChannelInit {
 // as binary or text.
 struct DataBuffer {
   DataBuffer(const rtc::CopyOnWriteBuffer& data, bool binary)
-      : data(data),
-        binary(binary) {
-  }
+      : data(data), binary(binary) {}
   // For convenience for unit tests.
   explicit DataBuffer(const std::string& text)
-      : data(text.data(), text.length()),
-        binary(false) {
-  }
+      : data(text.data(), text.length()), binary(false) {}
   size_t size() const { return data.size(); }
 
   rtc::CopyOnWriteBuffer data;