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}
diff --git a/rtc_base/nattypes.cc b/rtc_base/nattypes.cc
index 29936ad..a7af57d 100644
--- a/rtc_base/nattypes.cc
+++ b/rtc_base/nattypes.cc
@@ -15,31 +15,31 @@
 namespace rtc {
 
 class SymmetricNAT : public NAT {
-public:
- bool IsSymmetric() override { return true; }
- bool FiltersIP() override { return true; }
- bool FiltersPort() override { return true; }
+ public:
+  bool IsSymmetric() override { return true; }
+  bool FiltersIP() override { return true; }
+  bool FiltersPort() override { return true; }
 };
 
 class OpenConeNAT : public NAT {
-public:
- bool IsSymmetric() override { return false; }
- bool FiltersIP() override { return false; }
- bool FiltersPort() override { return false; }
+ public:
+  bool IsSymmetric() override { return false; }
+  bool FiltersIP() override { return false; }
+  bool FiltersPort() override { return false; }
 };
 
 class AddressRestrictedNAT : public NAT {
-public:
- bool IsSymmetric() override { return false; }
- bool FiltersIP() override { return true; }
- bool FiltersPort() override { return false; }
+ public:
+  bool IsSymmetric() override { return false; }
+  bool FiltersIP() override { return true; }
+  bool FiltersPort() override { return false; }
 };
 
 class PortRestrictedNAT : public NAT {
-public:
- bool IsSymmetric() override { return false; }
- bool FiltersIP() override { return true; }
- bool FiltersPort() override { return true; }
+ public:
+  bool IsSymmetric() override { return false; }
+  bool FiltersIP() override { return true; }
+  bool FiltersPort() override { return true; }
 };
 
 NAT* NAT::Create(NATType type) {
@@ -58,4 +58,4 @@
   }
 }
 
-} // namespace rtc
+}  // namespace rtc