Update from chromium https://crrev.com/301725/

net/filter/gzip_filter_unittest.cc

Index: net/filter/gzip_filter_unittest.cc
diff --git a/net/filter/gzip_filter_unittest.cc b/net/filter/gzip_filter_unittest.cc
index f3f91113f025f35537434af34503094ddd577352..2f11e28a9fbbfa24e8ae215137984fca0a94fcfe 100644
--- a/net/filter/gzip_filter_unittest.cc
+++ b/net/filter/gzip_filter_unittest.cc
@@ -49,7 +49,7 @@ namespace net {
 // Mac, so this needs to be a PlatformTest.
 class GZipUnitTest : public PlatformTest {
  protected:
-  virtual void SetUp() {
+  void SetUp() override {
     PlatformTest::SetUp();
 
     deflate_encode_buffer_ = NULL;
@@ -89,7 +89,7 @@ class GZipUnitTest : public PlatformTest {
     ASSERT_TRUE(gzip_encode_len_ <= kDefaultBufferSize);
   }
 
-  virtual void TearDown() {
+  void TearDown() override {
     delete[] deflate_encode_buffer_;
     deflate_encode_buffer_ = NULL;