Add UMA metrics and histograms for locally managed users.

chrome/browser/history/history_database.cc

Index: chrome/browser/history/history_database.cc
===================================================================
--- chrome/browser/history/history_database.cc	(revision 177135)
+++ chrome/browser/history/history_database.cc	(working copy)
@@ -13,6 +13,7 @@
 #include "base/metrics/histogram.h"
 #include "base/rand_util.h"
 #include "base/string_util.h"
+#include "base/time.h"
 #include "sql/transaction.h"
 
 #if defined(OS_MACOSX)
@@ -39,6 +40,7 @@
   if (base::RandInt(1, 100) != 50)
     return;  // Only do this computation sometimes since it can be expensive.
 
+  base::TimeTicks start_time = base::TimeTicks::Now();
   int64 file_size = 0;
   if (!file_util::GetFileSize(history_name, &file_size))
     return;
@@ -55,6 +57,23 @@
   if (!visit_count.Step())
     return;
   UMA_HISTOGRAM_COUNTS("History.VisitTableCount", visit_count.ColumnInt(0));
+
+  base::Time one_week_ago = base::Time::Now() - base::TimeDelta::FromDays(7);
+  sql::Statement weekly_visit_count(db.GetUniqueStatement(
+      "SELECT count(*) FROM visits WHERE visit_time > ?"));
+  weekly_visit_count.BindInt64(0, one_week_ago.ToInternalValue());
+  UMA_HISTOGRAM_COUNTS("History.WeeklyVisitCount",
+                       weekly_visit_count.ColumnInt(0));
+
+  base::Time one_month_ago = base::Time::Now() - base::TimeDelta::FromDays(30);
+  sql::Statement monthly_visit_count(db.GetUniqueStatement(
+      "SELECT count(*) FROM visits WHERE visit_time > ?"));
+  monthly_visit_count.BindInt64(0, one_month_ago.ToInternalValue());
+  UMA_HISTOGRAM_COUNTS("History.MonthlyVisitCount",
+                       monthly_visit_count.ColumnInt(0));
+
+  UMA_HISTOGRAM_TIMES("History.DatabaseBasicMetricsTime",
+                      base::TimeTicks::Now() - start_time);
 }
 
 }  // namespace