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=thestig@chromium.org

Review URL: https://codereview.chromium.org/679273002

Cr-Commit-Position: refs/heads/master@{#301498}

2 files changed, 2 insertions, 3 deletions

diff --git a/chrome/renderer/spellchecker/spellcheck_provider_test.h b/chrome/renderer/spellchecker/spellcheck_provider_test.h
index 4bd1940..5c1c559 100644
--- a/chrome/renderer/spellchecker/spellcheck_provider_test.h
+++ b/chrome/renderer/spellchecker/spellcheck_provider_test.h
@@ -56,7 +56,7 @@ class TestingSpellCheckProvider : public SpellCheckProvider {
 class SpellCheckProviderTest : public testing::Test {
  public:
   SpellCheckProviderTest();
-  virtual ~SpellCheckProviderTest();
+  ~SpellCheckProviderTest() override;
 
  protected:
   TestingSpellCheckProvider provider_;
diff --git a/chrome/renderer/spellchecker/spellcheck_unittest.cc b/chrome/renderer/spellchecker/spellcheck_unittest.cc
index e599145..ca28ff0 100644
--- a/chrome/renderer/spellchecker/spellcheck_unittest.cc
+++ b/chrome/renderer/spellchecker/spellcheck_unittest.cc
@@ -70,8 +70,7 @@ class SpellCheckTest : public testing::Test {
     spell_check_->OnEnableAutoSpellCorrect(enable_autocorrect);
   }
 
-  virtual ~SpellCheckTest() {
-  }
+  ~SpellCheckTest() override {}
 
   SpellCheck* spell_check() { return spell_check_.get(); }