Update from chromium https://crrev.com/302282

net/tools/flip_server/mem_cache_test.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/tools/flip_server/mem_cache.h"
 
 #include "net/tools/balsa/balsa_headers.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace net {
 
 namespace {
 
 class MemoryCacheWithFakeReadToString : public MemoryCache {
  public:
-  virtual ~MemoryCacheWithFakeReadToString() {}
+  ~MemoryCacheWithFakeReadToString() override {}
 
-  virtual void ReadToString(const char* filename,
-                            std::string* output) override {
+  void ReadToString(const char* filename, std::string* output) override {
     *output = data_map_[filename];
   }
 
   std::map<std::string, std::string> data_map_;
 };
 
 class FlipMemoryCacheTest : public ::testing::Test {
  public:
   FlipMemoryCacheTest() : mem_cache_(new MemoryCacheWithFakeReadToString) {}
 
@@ skipping 62 matching lines @@
 
   mem_cache_->ReadAndStoreFileContents("./hello.http");
   hello_html = mem_cache_->GetFileData("hello.html");
   ASSERT_FALSE(NULL == hello_html);
   ASSERT_EQ(hello_html, mem_cache_->GetFileData("hello.http"));
 }
 
 }  // namespace
 
 }  // namespace net