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/helpers_unittest.cc b/rtc_base/helpers_unittest.cc
index 9fa16a5..3e8729c 100644
--- a/rtc_base/helpers_unittest.cc
+++ b/rtc_base/helpers_unittest.cc
@@ -81,10 +81,12 @@
   std::string random;
   EXPECT_TRUE(CreateRandomData(kRandomDataLength, &random));
   EXPECT_EQ(kRandomDataLength, random.size());
-  Buffer expected("\xbd\x52\x2a\x4b\x97\x93\x2f\x1c"
+  Buffer expected(
+      "\xbd\x52\x2a\x4b\x97\x93\x2f\x1c"
       "\xc4\x72\xab\xa2\x88\x68\x3e\xcc"
       "\xa3\x8d\xaf\x13\x3b\xbc\x83\xbb"
-      "\x16\xf1\xcf\x56\x0c\xf5\x4a\x8b", kRandomDataLength);
+      "\x16\xf1\xcf\x56\x0c\xf5\x4a\x8b",
+      kRandomDataLength);
   EXPECT_EQ(0, memcmp(expected.data(), random.data(), kRandomDataLength));
 
   // Reset and make sure we get the same output.