prune down content_dll change to just the CONTENT_EXPORTS

content/browser/user_metrics.h

 // Copyright (c) 2010 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.
 
 #ifndef CONTENT_BROWSER_USER_METRICS_H_
 #define CONTENT_BROWSER_USER_METRICS_H_
 #pragma once
 
 #include <string>
 
+#include "content/common/content_export.h"
+
 // This module provides some helper functions for logging actions tracked by
 // the user metrics system.
 
 
 // UserMetricsAction exist purely to standardize on the paramters passed to
 // UserMetrics. That way, our toolset can scan the sourcecode reliable for
 // constructors and extract the associated string constants
 struct UserMetricsAction {
   const char* str_;
   explicit UserMetricsAction(const char* str) : str_(str) {}
 };
 
 
-class UserMetrics {
+class CONTENT_EXPORT UserMetrics {
  public:
   // Record that the user performed an action.
   // "Action" here means a user-generated event:
   //   good: "Reload", "CloseTab", and "IMEInvoked"
   //   not good: "SSLDialogShown", "PageLoaded", "DiskFull"
   // We use this to gather anonymized information about how users are
   // interacting with the browser.
   // WARNING: Call this function exactly like this:
   //   UserMetrics::RecordAction(UserMetricsAction("foo bar"));
   // (all on one line and with the metric string literal [no variables])
@@ skipping 13 matching lines @@
   // you need to also update the rules for extracting known actions in
   // chrome/tools/extract_actions.py.
   static void RecordComputedAction(const std::string& action);
 
  private:
   static void Record(const char *action);
   static void CallRecordOnUI(const std::string& action);
 };
 
 #endif  // CONTENT_BROWSER_USER_METRICS_H_