Standardize usage of virtual/override/final specifiers.

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=msw@chromium.org

Committed: https://crrev.com/0a5ed8fe9450d16d1a5a6a9be7a96be2e7179a14
Cr-Commit-Position: refs/heads/master@{#301456}

[msw, 2014-10-27 20:43:57]

lgtm with an optional tangential nit.

https://codereview.chromium.org/680023003/diff/1/ui/views/controls/textfield/...
File ui/views/controls/textfield/textfield_unittest.cc (right):

https://codereview.chromium.org/680023003/diff/1/ui/views/controls/textfield/...
ui/views/controls/textfield/textfield_unittest.cc:162: void SetUp() override {
ViewsTestBase::SetUp(); }
nit: I guess this can be removed altogether!

[dcheng, 2014-10-27 20:46:36]

https://codereview.chromium.org/680023003/diff/1/ui/views/controls/textfield/...
File ui/views/controls/textfield/textfield_unittest.cc (right):

https://codereview.chromium.org/680023003/diff/1/ui/views/controls/textfield/...
ui/views/controls/textfield/textfield_unittest.cc:162: void SetUp() override {
ViewsTestBase::SetUp(); }
On 2014/10/27 20:43:57, msw wrote:
> nit: I guess this can be removed altogether!

o.O

Let me clean this up in a followup, given the number of patches in flight, it'll
make my life a bit easier.

[msw, 2014-10-27 20:47:44]

slgtm

https://codereview.chromium.org/680023003/diff/1/ui/views/controls/textfield/...
File ui/views/controls/textfield/textfield_unittest.cc (right):

https://codereview.chromium.org/680023003/diff/1/ui/views/controls/textfield/...
ui/views/controls/textfield/textfield_unittest.cc:162: void SetUp() override {
ViewsTestBase::SetUp(); }
On 2014/10/27 20:46:36, dcheng wrote:
> On 2014/10/27 20:43:57, msw wrote:
> > nit: I guess this can be removed altogether!
> 
> o.O
> 
> Let me clean this up in a followup, given the number of patches in flight,
it'll
> make my life a bit easier.

Even doing this in a followup is optional for you.

[dcheng, 2014-10-27 20:49:04]

The CQ bit was checked by dcheng@chromium.org

[commit-bot: I haz the power, 2014-10-27 20:50:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/680023003/1

[commit-bot: I haz the power, 2014-10-27 21:55:56]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-27 21:56:26]

Patchset 1 (id:??) landed as
https://crrev.com/0a5ed8fe9450d16d1a5a6a9be7a96be2e7179a14
Cr-Commit-Position: refs/heads/master@{#301456}