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/video_coding/video_receiver_unittest.cc

@@ -76,7 +76,7 @@ class TestVideoReceiver : public ::testing::Test {
     EXPECT_EQ(0, receiver_->IncomingPacket(payload, length, *header));
     ++header->header.sequenceNumber;
     EXPECT_CALL(packet_request_callback_, ResendPackets(_, _)).Times(0);
-    receiver_->Process();;
+    receiver_->Process();
     EXPECT_CALL(decoder_, Decode(_, _, _, _)).Times(1);
     EXPECT_EQ(0, receiver_->Decode(100));
   }