Standardize usage of virtual/override/final in extensions/

extensions/browser/stash_backend_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 "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "extensions/browser/stash_backend.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace extensions {
 
 class StashServiceTest : public testing::Test, public mojo::ErrorHandler {
  public:
   enum Event {
     EVENT_NONE,
     EVENT_STASH_RETRIEVED,
   };
 
   StashServiceTest() {}
 
   virtual void SetUp() override {
     expecting_error_ = false;
     expected_event_ = EVENT_NONE;
     stash_backend_.reset(new StashBackend);
     stash_backend_->BindToRequest(mojo::GetProxy(&stash_service_));
     stash_service_.set_error_handler(this);
   }
 
-  virtual void OnConnectionError() override {
-    FAIL() << "Unexpected connection error";
-  }
+  void OnConnectionError() override { FAIL() << "Unexpected connection error"; }
 
   mojo::Array<StashedObjectPtr> RetrieveStash() {
     mojo::Array<StashedObjectPtr> stash;
     stash_service_->RetrieveStash(base::Bind(
         &StashServiceTest::StashRetrieved, base::Unretained(this), &stash));
     WaitForEvent(EVENT_STASH_RETRIEVED);
     return stash.Pass();
   }
 
   void StashRetrieved(mojo::Array<StashedObjectPtr>* output,
@@ skipping 124 matching lines @@
   ASSERT_EQ(0u, stashed_objects.size());
   // Check that the stashed handle has been closed.
   MojoResult result =
       mojo::Wait(message_pipe.handle1.get(),
                  MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_READABLE,
                  MOJO_DEADLINE_INDEFINITE);
   EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, result);
 }
 
 }  // namespace extensions