Standardize usage of virtual/override/final in ui/

ui/events/latency_info.cc

 // Copyright 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 "base/debug/trace_event.h"
 #include "base/json/json_writer.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/stringprintf.h"
 #include "ui/events/latency_info.h"
 
@@ skipping 58 matching lines @@
           type == ui::INPUT_EVENT_LATENCY_BEGIN_PLUGIN_COMPONENT ||
           type == ui::INPUT_EVENT_LATENCY_BEGIN_SCROLL_UPDATE_MAIN_COMPONENT);
 }
 
 // This class is for converting latency info to trace buffer friendly format.
 class LatencyInfoTracedValue : public base::debug::ConvertableToTraceFormat {
  public:
   static scoped_refptr<ConvertableToTraceFormat> FromValue(
       scoped_ptr<base::Value> value);
 
-  virtual void AppendAsTraceFormat(std::string* out) const override;
+  void AppendAsTraceFormat(std::string* out) const override;
 
  private:
   explicit LatencyInfoTracedValue(base::Value* value);
-  virtual ~LatencyInfoTracedValue();
+  ~LatencyInfoTracedValue() override;
 
   scoped_ptr<base::Value> value_;
 
   DISALLOW_COPY_AND_ASSIGN(LatencyInfoTracedValue);
 };
 
 scoped_refptr<base::debug::ConvertableToTraceFormat>
 LatencyInfoTracedValue::FromValue(scoped_ptr<base::Value> value) {
   return scoped_refptr<base::debug::ConvertableToTraceFormat>(
       new LatencyInfoTracedValue(value.release()));
@@ skipping 228 matching lines @@
 }
 
 void LatencyInfo::TraceEventType(const char* event_type) {
   TRACE_EVENT_ASYNC_STEP_INTO0("benchmark",
                                "InputLatency",
                                TRACE_ID_DONT_MANGLE(trace_id),
                                event_type);
 }
 
 }  // namespace ui