Some more virtual/override updates.

mojo/public/cpp/environment/tests/async_waiter_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 <string>
 
 #include "mojo/public/c/environment/async_waiter.h"
 #include "mojo/public/cpp/environment/environment.h"
 #include "mojo/public/cpp/system/core.h"
 #include "mojo/public/cpp/system/macros.h"
 #include "mojo/public/cpp/test_support/test_utils.h"
 #include "mojo/public/cpp/utility/run_loop.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
 namespace {
 
 class TestAsyncWaitCallback {
  public:
   TestAsyncWaitCallback() : result_count_(0), last_result_(MOJO_RESULT_OK) {}
-  virtual ~TestAsyncWaitCallback() {}
+  ~TestAsyncWaitCallback() {}
 
   int result_count() const { return result_count_; }
 
   MojoResult last_result() const { return last_result_; }
 
   // MojoAsyncWaitCallback:
   static void OnHandleReady(void* closure, MojoResult result) {
     TestAsyncWaitCallback* self = static_cast<TestAsyncWaitCallback*>(closure);
     self->result_count_++;
     self->last_result_ = result;
@@ skipping 73 matching lines @@
   EXPECT_TRUE(test::WriteTextMessage(test_pipe.handle1.get(), std::string()));
 
   CallCancelWait(CallAsyncWait(
       test_pipe.handle0.get(), MOJO_HANDLE_SIGNAL_READABLE, &callback));
   RunLoop::current()->Run();
   EXPECT_EQ(0, callback.result_count());
 }
 
 }  // namespace
 }  // namespace mojo