Update {virtual,override} to follow C++11 style in ui.

ui/events/event_processor_unittest.cc

 // Copyright (c) 2013 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 <vector>
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/events/event.h"
 #include "ui/events/event_targeter.h"
 #include "ui/events/event_utils.h"
@@ skipping 48 matching lines @@
   EXPECT_FALSE(root()->DidReceiveEvent(ET_MOUSE_MOVED));
 
   root()->RemoveChild(root()->child_at(0));
   DispatchEvent(&mouse);
   EXPECT_TRUE(root()->DidReceiveEvent(ET_MOUSE_MOVED));
 }
 
 template<typename T>
 class BoundsEventTargeter : public EventTargeter {
  public:
-  virtual ~BoundsEventTargeter() {}
+  ~BoundsEventTargeter() override {}
 
  protected:
-  virtual bool SubtreeShouldBeExploredForEvent(
+  bool SubtreeShouldBeExploredForEvent(
       EventTarget* target, const LocatedEvent& event) override {
     T* t = static_cast<T*>(target);
     return (t->bounds().Contains(event.location()));
   }
 };
 
 class BoundsTestTarget : public TestEventTarget {
  public:
   BoundsTestTarget() {}
   ~BoundsTestTarget() override {}
@@ skipping 432 matching lines @@
   DispatchEvent(&mouse);
 
   std::string expected[] = { "PreR", "PreC", "PreG", "G", "PostG", "PostC",
       "PostR", "PreR", "PreC", "C", "PostC", "PostR", "PreR", "R", "PostR" };
   EXPECT_EQ(std::vector<std::string>(
       expected, expected + arraysize(expected)), recorder);
 }
 
 }  // namespace test
 }  // namespace ui