Some more virtual/override updates.

mojo/public/cpp/bindings/tests/sample_service_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 <algorithm>
 #include <ostream>
 #include <string>
 
 #include "mojo/public/cpp/environment/environment.h"
 #include "mojo/public/cpp/system/macros.h"
@@ skipping 294 matching lines @@
 
   bool AcceptWithResponder(mojo::Message* message,
                            mojo::MessageReceiver* responder) override {
     return false;
   }
 };
 
 class BindingsSampleTest : public testing::Test {
  public:
   BindingsSampleTest() {}
-  virtual ~BindingsSampleTest() {}
+  ~BindingsSampleTest() override {}
 
  private:
   mojo::Environment env_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(BindingsSampleTest);
 };
 
 TEST_F(BindingsSampleTest, Basic) {
   SimpleMessageReceiver receiver;
 
@@ skipping 42 matching lines @@
   ASSERT_FALSE(defaults->a22.is_null());
   EXPECT_EQ(imported::SHAPE_RECTANGLE, defaults->a22->shape);
   EXPECT_EQ(imported::COLOR_BLACK, defaults->a22->color);
   EXPECT_EQ(0xFFFFFFFFFFFFFFFFULL, defaults->a23);
   EXPECT_EQ(0x123456789, defaults->a24);
   EXPECT_EQ(-0x123456789, defaults->a25);
 }
 
 }  // namespace
 }  // namespace sample