Some more virtual/override updates.

mojo/public/cpp/bindings/tests/map_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/bindings/array.h"
 #include "mojo/public/cpp/bindings/lib/array_serialization.h"
 #include "mojo/public/cpp/bindings/lib/bindings_internal.h"
 #include "mojo/public/cpp/bindings/lib/fixed_buffer.h"
 #include "mojo/public/cpp/bindings/map.h"
 #include "mojo/public/cpp/bindings/string.h"
@@ skipping 14 matching lines @@
       {"one", 1},
       {"two", 2},
       {"three", 3},
       {"four", 4},
 };
 
 const size_t kStringIntDataSize = 4;
 
 class MapTest : public testing::Test {
  public:
-  virtual ~MapTest() {}
+  ~MapTest() override {}
 
  private:
   Environment env_;
 };
 
 // Tests that basic Map operations work.
 TEST_F(MapTest, InsertWorks) {
   Map<String, int> map;
   for (size_t i = 0; i < kStringIntDataSize; ++i)
     map.insert(kStringIntData[i].string_data, kStringIntData[i].int_data);
@@ skipping 352 matching lines @@
 
   ASSERT_EQ(1u, to_receive->second.size());
   ASSERT_EQ(1u, to_receive->second[0].size());
   ASSERT_FALSE(to_receive->second[0].at("hello world")[0]);
   ASSERT_TRUE(to_receive->second[0].at("hello world")[1]);
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace mojo