Some more virtual/override updates.

mojo/public/cpp/bindings/tests/equals_unittest.cc

 // Copyright 2014 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 "mojo/public/cpp/environment/environment.h"
 #include "mojo/public/interfaces/bindings/tests/test_structs.mojom.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
 namespace test {
 
 namespace {
 
 RectPtr CreateRect() {
   RectPtr r = Rect::New();
   r->x = 1;
   r->y = 2;
   r->width = 3;
   r->height = 4;
   return r.Pass();
 }
 
 class EqualsTest : public testing::Test {
  public:
-  virtual ~EqualsTest() {}
+  ~EqualsTest() override {}
 
  private:
   Environment env_;
 };
 }
 
 TEST_F(EqualsTest, Null) {
   RectPtr r1;
   RectPtr r2;
   EXPECT_TRUE(r1.Equals(r2));
@@ skipping 75 matching lines @@
   m2.at("foo")->rects.resize(1);
   m2.at("foo")->rects[0]->width = 1;
   EXPECT_FALSE(m1.Equals(m2));
 
   m2 = m1.Clone();
   EXPECT_TRUE(m1.Equals(m2));
 }
 
 }  // test
 }  // mojo