Base: A few more files using BASE_API (for base.dll)

base/metrics/stats_counters.h

Index: base/metrics/stats_counters.h
===================================================================
--- base/metrics/stats_counters.h	(revision 79303)
+++ base/metrics/stats_counters.h	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
@@ -8,6 +8,7 @@
 
 #include <string>
 
+#include "base/base_api.h"
 #include "base/metrics/stats_table.h"
 #include "base/time.h"
 
@@ -74,7 +75,7 @@
 
 //------------------------------------------------------------------------------
 // StatsCounter represents a counter in the StatsTable class.
-class StatsCounter {
+class BASE_API StatsCounter {
  public:
   // Create a StatsCounter object.
   explicit StatsCounter(const std::string& name);
@@ -128,7 +129,7 @@
 // A StatsCounterTimer is a StatsCounter which keeps a timer during
 // the scope of the StatsCounterTimer.  On destruction, it will record
 // its time measurement.
-class StatsCounterTimer : protected StatsCounter {
+class BASE_API StatsCounterTimer : protected StatsCounter {
  public:
   // Constructs and starts the timer.
   explicit StatsCounterTimer(const std::string& name);
@@ -157,7 +158,7 @@
 // A StatsRate is a timer that keeps a count of the number of intervals added so
 // that several statistics can be produced:
 //    min, max, avg, count, total
-class StatsRate : public StatsCounterTimer {
+class BASE_API StatsRate : public StatsCounterTimer {
  public:
   // Constructs and starts the timer.
   explicit StatsRate(const std::string& name);