Add virtual and OVERRIDE to base/ implementation files

base/memory/scoped_ptr_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/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 // Used to test depth subtyping.
 class ConDecLoggerParent {
  public:
   virtual ~ConDecLoggerParent() {}
   virtual void set_ptr(int* ptr) = 0;
 
   virtual int SomeMeth(int x) const = 0;
 };
 
 class ConDecLogger : public ConDecLoggerParent {
  public:
   ConDecLogger() : ptr_(NULL) { }
   explicit ConDecLogger(int* ptr) { set_ptr(ptr); }
   virtual ~ConDecLogger() { --*ptr_; }
 
-  virtual void set_ptr(int* ptr) { ptr_ = ptr; ++*ptr_; }
+  virtual void set_ptr(int* ptr) OVERRIDE { ptr_ = ptr; ++*ptr_; }
 
-  virtual int SomeMeth(int x) const { return x; }
+  virtual int SomeMeth(int x) const OVERRIDE { return x; }
 
  private:
   int* ptr_;
   DISALLOW_COPY_AND_ASSIGN(ConDecLogger);
 };
 
 scoped_ptr<ConDecLogger> PassThru(scoped_ptr<ConDecLogger> logger) {
   return logger.Pass();
 }
 
@@ skipping 309 matching lines @@
     scoped_ptr<ConDecLoggerParent> scoper_parent;
     scoper_parent = UpcastUsingPassAs(scoper.Pass());
     EXPECT_EQ(1, constructed);
     EXPECT_TRUE(scoper_parent.get());
     EXPECT_FALSE(scoper.get());
   }
   EXPECT_EQ(0, constructed);
 }
 
 // TODO scoped_ptr_malloc