Initial support for Renderer Side Histograms...

chrome/browser/metrics/metrics_service.h

 // Copyright (c) 2006-2008 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.
 
 // This file defines a service that collects information about the user
 // experience in order to help improve future versions of the app.
 
 #ifndef CHROME_BROWSER_METRICS_SERVICE_H_
 #define CHROME_BROWSER_METRICS_SERVICE_H_
 
@@ skipping 324 matching lines @@
   void LogKeywords(const TemplateURLModel* url_model);
 
   // Saves plugin-related updates from the in-object buffer to Local State
   // for retrieval next time we send a Profile log (generally next launch).
   void RecordPluginChanges(PrefService* pref);
 
   // Records state that should be periodically saved, like uptime and
   // buffered plugin stability statistics.
   void RecordCurrentState(PrefService* pref);
 
+  // Requests all renderers to send their histograms back for
+  // collecting stats from renderers.
+  void CollectRendererHistograms();
+
   // Record complete list of histograms into the current log.
   // Called when we close a log.
   void RecordCurrentHistograms();
+
   // Record a specific histogram .
   void RecordHistogram(const Histogram& histogram);
 
   // Logs the initiation of a page load
   void LogLoadStarted();
 
   // Records a page load notification.
   void LogLoadComplete(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
@@ skipping 104 matching lines @@
   std::set<std::string> histograms_to_upload_;
   std::set<std::string> histograms_to_omit_;
 
   // Indicate that a timer for sending the next log has already been queued.
   bool timer_pending_;
 
   DISALLOW_COPY_AND_ASSIGN(MetricsService);
 };
 
 #endif  // CHROME_BROWSER_METRICS_SERVICE_H_