tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index d9c2dd62b43f580b82e97832591fe4c50d2336dd..ea3e9c3b3a6d3c67afa2ea5fe863786022da8183 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -13279,6 +13279,30 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="History.DatabaseAdvancedMetricsTime">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>

[rkaplow, 2015/08/04 15:03:09]

please fill in owners files for each

[Alexander Yashkin, 2015/08/05 08:34:59]

Added sky@chromium.org as owner.

+  <summary>
+    Time spent on advanced History metrics calculation. Advanced metrics are
+    logged on initialization of the History DB on 0.3% of starts.
+  </summary>
+</histogram>
+
+<histogram name="History.DatabaseBasicMetricsTime">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>
+    Time spent on basic History metrics calculation. Basic metrics are logged on
+    initialization of the History DB on 1% of starts.
+  </summary>
+</histogram>
+
+<histogram name="History.DatabaseFileMB">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>
+    Size of History DB in MB. Seems to be duplicate of Profile.HistorySize.

[rkaplow, 2015/08/04 15:03:09]

if this is a duplicate is this needed?

[Scott Hess - ex-Googler, 2015/08/04 17:28:01]

Also duplicates Sqlite.SizeKB.History .

[Alexander Yashkin, 2015/08/05 08:34:58]

History.DatabaseFileMB is send on 1% of browser runs and Profile.HistorySize is
send on every profile load.
So it makes sense to me to remove sending of History.DatabaseFileMB histogram
from browser code.
Yet, if i understand correctly, this file must contain descriptions for all
histograms that were ever send, even obsolete and deprecated.

+    Logged on initialization of the History DB on 1% of starts.
+  </summary>
+</histogram>
+
 <histogram name="History.DeleteFTSIndexDatabases">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <summary>
@@ -13368,6 +13392,31 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="History.MonthlyHostCount">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>
+    Number of unique hosts visited within last month. Metrics are logged on
+    initialization of the History DB on 0.3% of starts.
+  </summary>
+</histogram>
+
+<histogram name="History.MonthlyURLCount">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>
+    Number of urls visited within last month. Metrics are logged on
+    initialization of the History DB on 0.3% of starts.
+  </summary>
+</histogram>
+
+<histogram name="History.MonthlyVisitCount">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>
+    Number of records in History visits table that were added in interval
+    between one month ago and one week ago. Metrics are logged on initialization
+    of the History DB on 1% of starts.
+  </summary>
+</histogram>
+
 <histogram name="History.NumFaviconBitmapsInDB">
   <owner>rogerm@chromium.org</owner>
   <summary>
@@ -13484,6 +13533,46 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="History.URLTableCount">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>
+    Number of records in urls table in History DB. Metrics are logged on
+    initialization of the History DB on 1% of starts.
+  </summary>
+</histogram>
+
+<histogram name="History.VisitTableCount">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>
+    Number of records in visits table in History DB. Metrics are logged on
+    initialization of the History DB on 1% of starts.
+  </summary>
+</histogram>
+
+<histogram name="History.WeeklyHostCount">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>
+    Number of unique hosts visited within last week. Metrics are logged on
+    initialization of the History DB on 0.3% of starts.
+  </summary>
+</histogram>
+
+<histogram name="History.WeeklyURLCount">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>
+    Number of urls visited within last week. Metrics are logged on
+    initialization of the History DB on 0.3% of starts.
+  </summary>
+</histogram>
+
+<histogram name="History.WeeklyVisitCount">
+  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
+  <summary>
+    Number of records in History visits table that were added in last week.
+    Metrics are logged on initialization of the History DB on 1% of starts.
+  </summary>
+</histogram>
+
 <histogram name="HistoryPage.ClickPosition">
   <owner>rpop@google.com</owner>
   <summary>