Revert of Standardize usage of virtual/override/final in ipc/

ipc/mojo/ipc_mojo_bootstrap_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 "ipc/mojo/ipc_mojo_bootstrap.h"
 
 #include "base/base_paths.h"
 #include "base/files/file.h"
 #include "base/message_loop/message_loop.h"
 #include "ipc/ipc_test_base.h"
 
 #if defined(OS_POSIX)
 #include "base/file_descriptor_posix.h"
 #endif
 
 namespace {
 
 class IPCMojoBootstrapTest : public IPCTestBase {
  protected:
 };
 
 class TestingDelegate : public IPC::MojoBootstrap::Delegate {
  public:
   TestingDelegate() : passed_(false) {}
 
-  void OnPipeAvailable(mojo::embedder::ScopedPlatformHandle handle) override;
-  void OnBootstrapError() override;
+  virtual void OnPipeAvailable(
+      mojo::embedder::ScopedPlatformHandle handle) override;
+  virtual void OnBootstrapError() override;
 
   bool passed() const { return passed_; }
 
  private:
   bool passed_;
 };
 
 void TestingDelegate::OnPipeAvailable(
     mojo::embedder::ScopedPlatformHandle handle) {
   passed_ = true;
@@ skipping 38 matching lines @@
   bootstrap->Connect();
 
   base::MessageLoop::current()->Run();
 
   EXPECT_TRUE(delegate.passed());
 
   return 0;
 }
 
 }  // namespace