Standardize usage of virtual/override/final specifiers.

content/browser/frame_host/navigation_entry_impl_unittest.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 "base/strings/string16.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "content/browser/frame_host/navigation_entry_impl.h"
 #include "content/browser/site_instance_impl.h"
 #include "content/public/common/ssl_status.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using base::ASCIIToUTF16;
 
 namespace content {
 
 class NavigationEntryTest : public testing::Test {
  public:
   NavigationEntryTest() : instance_(NULL) {
   }
 
-  virtual void SetUp() {
+  void SetUp() override {
     entry1_.reset(new NavigationEntryImpl);
 
 #if !defined(OS_IOS)
     instance_ = static_cast<SiteInstanceImpl*>(SiteInstance::Create(NULL));
 #endif
     entry2_.reset(new NavigationEntryImpl(
           instance_, 3,
           GURL("test:url"),
           Referrer(GURL("from"), blink::WebReferrerPolicyDefault),
           ASCIIToUTF16("title"),
           ui::PAGE_TRANSITION_TYPED,
           false));
   }
 
-  virtual void TearDown() {
-  }
+  void TearDown() override {}
 
  protected:
   scoped_ptr<NavigationEntryImpl> entry1_;
   scoped_ptr<NavigationEntryImpl> entry2_;
   // SiteInstances are deleted when their NavigationEntries are gone.
   SiteInstanceImpl* instance_;
 };
 
 // Test unique ID accessors
 TEST_F(NavigationEntryTest, NavigationEntryUniqueIDs) {
@@ skipping 187 matching lines @@
   // Content in |output| is not modified if data is not present at the key.
   EXPECT_FALSE(entry1_->GetExtraData("search_terms", &output));
   EXPECT_EQ(test_data, output);
   // Using an empty string shows that the data is not present in the map.
   base::string16 output2;
   EXPECT_FALSE(entry1_->GetExtraData("search_terms", &output2));
   EXPECT_EQ(ASCIIToUTF16(""), output2);
 }
 
 }  // namespace content