Add virtual and OVERRIDE to base/ implementation files

base/debug/trace_event_unittest.cc

 // Copyright (c) 2012 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/bind.h"
 #include "base/command_line.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
@@ skipping 40 matching lines @@
                                          const char* value);
   bool FindMatchingValue(const char* key,
                          const char* value);
   bool FindNonMatchingValue(const char* key,
                             const char* value);
   void Clear() {
     trace_parsed_.Clear();
     json_output_.json_output.clear();
   }
 
-  virtual void SetUp() {
+  virtual void SetUp() OVERRIDE {
     old_thread_name_ = PlatformThread::GetName();
   }
-  virtual void TearDown() {
+  virtual void TearDown() OVERRIDE {
     if (TraceLog::GetInstance())
       EXPECT_FALSE(TraceLog::GetInstance()->IsEnabled());
     PlatformThread::SetName(old_thread_name_ ? old_thread_name_  : "");
   }
 
   const char* old_thread_name_;
   ListValue trace_parsed_;
   base::debug::TraceResultBuffer trace_buffer_;
   base::debug::TraceResultBuffer::SimpleOutput json_output_;
 
@@ skipping 1290 matching lines @@
   Clear();
 
   trace_buffer_.Start();
   trace_buffer_.AddFragment("bla1,bla2,bla3,bla4");
   trace_buffer_.Finish();
   EXPECT_STREQ(json_output_.json_output.c_str(), "[bla1,bla2,bla3,bla4]");
 }
 
 }  // namespace debug
 }  // namespace base