Chrome Performance Monitor: Metric API Functions.

chrome/browser/performance_monitor/performance_monitor_util.h

Index: chrome/browser/performance_monitor/performance_monitor_util.h
diff --git a/chrome/browser/performance_monitor/performance_monitor_util.h b/chrome/browser/performance_monitor/performance_monitor_util.h
index 11779488c3c5f19b822619ff9f3a841cfa434878..6587201eac89c1d1134cd41ce7d4de543591cefd 100644
--- a/chrome/browser/performance_monitor/performance_monitor_util.h
+++ b/chrome/browser/performance_monitor/performance_monitor_util.h
@@ -5,6 +5,7 @@
 #ifndef CHROME_BROWSER_PERFORMANCE_MONITOR_UTIL_H_
 #define CHROME_BROWSER_PERFORMANCE_MONITOR_UTIL_H_
 
+#include "base/threading/sequenced_worker_pool.h"
 #include "base/time.h"
 #include "chrome/browser/performance_monitor/event.h"
 #include "chrome/browser/performance_monitor/metric_info.h"
@@ -24,6 +25,12 @@ std::vector<MetricInfo> AggregateMetric(
     const base::Time& start,
     const base::TimeDelta& resolution);
 
+// Posts |request| to the performance monitor database's sequenced thread. On
+// completion |reply| is posted to the thread that called
+// PostTaskToDatabaseThreadAndReply.
+bool PostTaskToDatabaseThreadAndReply(const base::Closure& request,
+                                      const base::Closure& reply);
+
 // These are a collection of methods designed to create an event to store the
 // pertinent information, given all the fields. Please use these methods to
 // create any PerformanceMonitor events, as this will ensure strong-typing