Standardize usage of virtual/override/final specifiers.

The Google C++ style guide states:

  Explicitly annotate overrides of virtual functions or virtual
  destructors with an override or (less frequently) final specifier.
  Older (pre-C++11) code will use the virtual keyword as an inferior
  alternative annotation. For clarity, use exactly one of override,
  final, or virtual when declaring an override.

To better conform to these guidelines, the following constructs have
been rewritten:

- if a base class has a virtual destructor, then:
    virtual ~Foo();                   ->  ~Foo() override;
- virtual void Foo() override;        ->  void Foo() override;
- virtual void Foo() override final;  ->  void Foo() final;

This patch was automatically generated. The clang plugin can generate
fixit hints, which are suggested edits when it is 100% sure it knows how
to fix a problem. The hints from the clang plugin were applied to the
source tree using the tool in https://codereview.chromium.org/598073004.

BUG=417463
R=jyasskin@chromium.org

Review URL: https://codereview.chromium.org/685503002

Cr-Commit-Position: refs/heads/master@{#301450}

3 files changed, 7 insertions, 7 deletions

diff --git a/extensions/browser/value_store/leveldb_value_store_unittest.cc b/extensions/browser/value_store/leveldb_value_store_unittest.cc
index a81f887..3c0fd53 100644
--- a/extensions/browser/value_store/leveldb_value_store_unittest.cc
+++ b/extensions/browser/value_store/leveldb_value_store_unittest.cc
@@ -32,16 +32,16 @@ INSTANTIATE_TEST_CASE_P(
 class LeveldbValueStoreUnitTest : public testing::Test {
  public:
   LeveldbValueStoreUnitTest() {}
-  virtual ~LeveldbValueStoreUnitTest() {}
+  ~LeveldbValueStoreUnitTest() override {}
 
  protected:
-  virtual void SetUp() override {
+  void SetUp() override {
     ASSERT_TRUE(database_dir_.CreateUniqueTempDir());
     OpenStore();
     ASSERT_FALSE(store_->Get()->HasError());
   }
 
-  virtual void TearDown() override {
+  void TearDown() override {
     store_->Clear();
     store_.reset();
   }
diff --git a/extensions/browser/value_store/value_store_frontend_unittest.cc b/extensions/browser/value_store/value_store_frontend_unittest.cc
index 6622af9..c3e6f85 100644
--- a/extensions/browser/value_store/value_store_frontend_unittest.cc
+++ b/extensions/browser/value_store/value_store_frontend_unittest.cc
@@ -21,7 +21,7 @@ class ValueStoreFrontendTest : public testing::Test {
         file_thread_(BrowserThread::FILE, base::MessageLoop::current()) {
   }
 
-  virtual void SetUp() {
+  void SetUp() override {
     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
 
     base::FilePath test_data_dir;
@@ -33,7 +33,7 @@ class ValueStoreFrontendTest : public testing::Test {
     ResetStorage();
   }
 
-  virtual void TearDown() {
+  void TearDown() override {
     base::MessageLoop::current()->RunUntilIdle();  // wait for storage to delete
     storage_.reset();
   }
diff --git a/extensions/browser/value_store/value_store_unittest.h b/extensions/browser/value_store/value_store_unittest.h
index 3571b35..f50e690 100644
--- a/extensions/browser/value_store/value_store_unittest.h
+++ b/extensions/browser/value_store/value_store_unittest.h
@@ -24,8 +24,8 @@ class ValueStoreTest : public testing::TestWithParam<ValueStoreTestParam> {
   ValueStoreTest();
   virtual ~ValueStoreTest();
 
-  virtual void SetUp() override;
-  virtual void TearDown() override;
+  void SetUp() override;
+  void TearDown() override;
 
  protected:
   scoped_ptr<ValueStore> storage_;