Standardize usage of virtual/override/final in skia/

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=junov@chromium.org

Review URL: https://codereview.chromium.org/665373005

Cr-Commit-Position: refs/heads/master@{#300701}

1 files changed, 5 insertions, 7 deletions

diff --git a/skia/ext/pixel_ref_utils_unittest.cc b/skia/ext/pixel_ref_utils_unittest.cc
index aef5766..656ef5c 100644
--- a/skia/ext/pixel_ref_utils_unittest.cc
+++ b/skia/ext/pixel_ref_utils_unittest.cc
@@ -34,20 +34,18 @@ class TestDiscardableShader : public SkShader {
     CreateBitmap(gfx::Size(50, 50), "discardable", &bitmap_);
   }
 
-  virtual SkShader::BitmapType asABitmap(SkBitmap* bitmap,
-                                         SkMatrix* matrix,
-                                         TileMode xy[2]) const override {
+  SkShader::BitmapType asABitmap(SkBitmap* bitmap,
+                                 SkMatrix* matrix,
+                                 TileMode xy[2]) const override {
     if (bitmap)
       *bitmap = bitmap_;
     return SkShader::kDefault_BitmapType;
   }
 
   // not indended to return an actual context. Just need to supply this.
-  virtual size_t contextSize() const override {
-    return sizeof(SkShader::Context);
-  }
+  size_t contextSize() const override { return sizeof(SkShader::Context); }
 
-  virtual void flatten(SkWriteBuffer&) const override {}
+  void flatten(SkWriteBuffer&) const override {}
 
   SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(TestDiscardableShader);