Small: Add store specific histograms also.

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 03d51e6923556d4be559fe42423f467b7ddd6a47..db2fb4b489496830e8cdbfc9b597eb2e674097ef 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -51459,6 +51459,61 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram
+    name="SafeBrowsing.V4ProcessFullUpdate.ApplyUpdate.UrlMalware.Result"

[Nathan Parker, 2016/10/18 04:06:18]

We really need to use the templating functionality to expand these.  Otherwise,
this CL turns three short strings into 480 lines of mechanical config with
repeated descriptios, and kind of spoils the ease with which we can add a new
store.

holte -- Is there a better way to do this?

If we cannot parameterize the second-to-last dotted-component, how about we
switch up the scheme to put the store name at the end since we can parameterize
that? Then you could define these metrics

SafeBrowsing.V4ProcessFullUpdate.ApplyUpdate.Time
SafeBrowsing.V4ProcessFullUpdate.ApplyUpdate.Result
SafeBrowsing.V4ProcessFullUpdate.DecodeAdditions.Time
SafeBrowsing.V4ProcessFullUpdate.DecodeAdditions.Result
SafeBrowsing.V4ProcessFullUpdate.MergeUpdate.Time
...

And then

<histogram_suffixes name="SafeBrowsingStoreMetrics">
    <suffix name="UrlMalware"/>
    <suffix name="UrlSoceng"/>
    <suffix name="UrlUws"/>
    // Add new stores here.

    <affected-histogram
name="SafeBrowsing.V4ProcessFullUpdate.ApplyUpdate.Time"/>
    <affected-histogram
name="SafeBrowsing.V4ProcessFullUpdate.ApplyUpdate.Result"/>
    ...
 </histogram_suffixes>

That makes it just one line to add a new store.  You could also parameterize the
.Time and .Result metrics which would cut them in half, though that's a bit less
important since we're not likely to add more of those.

+    enum="SafeBrowsingV4ApplyUpdateResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessFullUpdate.ApplyUpdate.Result but for
+    UrlMalware list specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ProcessFullUpdate.ApplyUpdate.UrlMalware.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessFullUpdate.ApplyUpdate.Time but for UrlMalware
+    list specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ProcessFullUpdate.ApplyUpdate.UrlSoceng.Result"
+    enum="SafeBrowsingV4ApplyUpdateResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessFullUpdate.ApplyUpdate.Result but for
+    UrlSoceng list specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ProcessFullUpdate.ApplyUpdate.UrlSoceng.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessFullUpdate.ApplyUpdate.Time but for UrlSoceng
+    list specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ProcessFullUpdate.ApplyUpdate.UrlUws.Result"
+    enum="SafeBrowsingV4ApplyUpdateResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessFullUpdate.ApplyUpdate.Result but for UrlUws
+    list specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ProcessFullUpdate.ApplyUpdate.UrlUws.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessFullUpdate.ApplyUpdate.Time but for UrlUws
+    list specifically.
+  </summary>
+</histogram>
+
 <histogram name="SafeBrowsing.V4ProcessFullUpdate.DecodeAdditions.Result"
     enum="SafeBrowsingV4DecodeResult">
   <owner>vakh@chromium.org</owner>
@@ -51479,6 +51534,65 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram
+    name="SafeBrowsing.V4ProcessFullUpdate.DecodeAdditions.UrlMalware.Result"
+    enum="SafeBrowsingV4DecodeResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessFullUpdate.DecodeAdditions.Result but for
+    UrlMalware list specifically.
+  </summary>
+</histogram>
+
+<histogram
+    name="SafeBrowsing.V4ProcessFullUpdate.DecodeAdditions.UrlMalware.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessFullUpdate.DecodeAdditions.Time but for
+    UrlMalware list specifically.
+  </summary>
+</histogram>
+
+<histogram
+    name="SafeBrowsing.V4ProcessFullUpdate.DecodeAdditions.UrlSoceng.Result"
+    enum="SafeBrowsingV4DecodeResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessFullUpdate.DecodeAdditions.Result but for
+    UrlSoceng list specifically.
+  </summary>
+</histogram>
+
+<histogram
+    name="SafeBrowsing.V4ProcessFullUpdate.DecodeAdditions.UrlSoceng.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessFullUpdate.DecodeAdditions.Time but for
+    UrlSoceng list specifically.
+  </summary>
+</histogram>
+
+<histogram
+    name="SafeBrowsing.V4ProcessFullUpdate.DecodeAdditions.UrlUws.Result"
+    enum="SafeBrowsingV4DecodeResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessFullUpdate.DecodeAdditions.Result but for
+    UrlUws list specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ProcessFullUpdate.DecodeAdditions.UrlUws.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessFullUpdate.DecodeAdditions.Time but for UrlUws
+    list specifically.
+  </summary>
+</histogram>
+
 <histogram name="SafeBrowsing.V4ProcessFullUpdate.MergeUpdate.Time" units="ms">
   <owner>vakh@chromium.org</owner>
   <summary>
@@ -51487,6 +51601,33 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="SafeBrowsing.V4ProcessFullUpdate.MergeUpdate.UrlMalware.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessFullUpdate.MergeUpdate.Time but for UrlMalware
+    list specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ProcessFullUpdate.MergeUpdate.UrlSoceng.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessFullUpdate.MergeUpdate.Time but for UrlSoceng
+    list specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ProcessFullUpdate.MergeUpdate.UrlUws.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessFullUpdate.MergeUpdate.Time but for UrlUws
+    list specifically.
+  </summary>
+</histogram>
+
 <histogram name="SafeBrowsing.V4ProcessFullUpdateTime" units="ms">
   <obsolete>
     Replaced by SafeBrowsing.V4ProcessFullUpdate.ApplyUpdate.Time.
@@ -51523,6 +51664,64 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram
+    name="SafeBrowsing.V4ProcessPartialUpdate.ApplyUpdate.UrlMalware.Result"
+    enum="SafeBrowsingV4ApplyUpdateResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.ApplyUpdate.Result but for
+    UrlMalware list specifically.
+  </summary>
+</histogram>
+
+<histogram
+    name="SafeBrowsing.V4ProcessPartialUpdate.ApplyUpdate.UrlMalware.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.ApplyUpdate.Time but for
+    UrlMalware list specifically.
+  </summary>
+</histogram>
+
+<histogram
+    name="SafeBrowsing.V4ProcessPartialUpdate.ApplyUpdate.UrlSoceng.Result"
+    enum="SafeBrowsingV4ApplyUpdateResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.ApplyUpdate.Result but for
+    UrlSoceng list specifically.
+  </summary>
+</histogram>
+
+<histogram
+    name="SafeBrowsing.V4ProcessPartialUpdate.ApplyUpdate.UrlSoceng.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.ApplyUpdate.Time but for
+    UrlSoceng list specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ProcessPartialUpdate.ApplyUpdate.UrlUws.Result"
+    enum="SafeBrowsingV4ApplyUpdateResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.ApplyUpdate.Result but for
+    UrlUws list specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ProcessPartialUpdate.ApplyUpdate.UrlUws.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.ApplyUpdate.Time but for UrlUws
+    list specifically.
+  </summary>
+</histogram>
+
 <histogram name="SafeBrowsing.V4ProcessPartialUpdate.DecodeAdditions.Result"
     enum="SafeBrowsingV4DecodeResult">
   <owner>vakh@chromium.org</owner>
@@ -51543,6 +51742,66 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram
+    name="SafeBrowsing.V4ProcessPartialUpdate.DecodeAdditions.UrlMalware.Result"
+    enum="SafeBrowsingV4DecodeResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.DecodeAdditions.Result but for
+    UrlMalware list specifically.
+  </summary>
+</histogram>
+
+<histogram
+    name="SafeBrowsing.V4ProcessPartialUpdate.DecodeAdditions.UrlMalware.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.DecodeAdditions.Time but for
+    UrlMalware list specifically.
+  </summary>
+</histogram>
+
+<histogram
+    name="SafeBrowsing.V4ProcessPartialUpdate.DecodeAdditions.UrlSoceng.Result"
+    enum="SafeBrowsingV4DecodeResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.DecodeAdditions.Result but for
+    UrlSoceng list specifically.
+  </summary>
+</histogram>
+
+<histogram
+    name="SafeBrowsing.V4ProcessPartialUpdate.DecodeAdditions.UrlSoceng.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.DecodeAdditions.Time but for
+    UrlSoceng list specifically.
+  </summary>
+</histogram>
+
+<histogram
+    name="SafeBrowsing.V4ProcessPartialUpdate.DecodeAdditions.UrlUws.Result"
+    enum="SafeBrowsingV4DecodeResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.DecodeAdditions.Result but for
+    UrlUws list specifically.
+  </summary>
+</histogram>
+
+<histogram
+    name="SafeBrowsing.V4ProcessPartialUpdate.DecodeAdditions.UrlUws.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.DecodeAdditions.Time but for
+    UrlUws list specifically.
+  </summary>
+</histogram>
+
 <histogram name="SafeBrowsing.V4ProcessPartialUpdate.DecodeRemovals.Result"
     enum="SafeBrowsingV4DecodeResult">
   <owner>vakh@chromium.org</owner>
@@ -51562,6 +51821,66 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram
+    name="SafeBrowsing.V4ProcessPartialUpdate.DecodeRemovals.UrlMalware.Result"
+    enum="SafeBrowsingV4DecodeResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.DecodeRemovals.Result but for
+    UrlMalware list specifically.
+  </summary>
+</histogram>
+
+<histogram
+    name="SafeBrowsing.V4ProcessPartialUpdate.DecodeRemovals.UrlMalware.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.DecodeRemovals.Time but for
+    UrlMalware list specifically.
+  </summary>
+</histogram>
+
+<histogram
+    name="SafeBrowsing.V4ProcessPartialUpdate.DecodeRemovals.UrlSoceng.Result"
+    enum="SafeBrowsingV4DecodeResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.DecodeRemovals.Result but for
+    UrlSoceng list specifically.
+  </summary>
+</histogram>
+
+<histogram
+    name="SafeBrowsing.V4ProcessPartialUpdate.DecodeRemovals.UrlSoceng.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.DecodeRemovals.Time but for
+    UrlSoceng list specifically.
+  </summary>
+</histogram>
+
+<histogram
+    name="SafeBrowsing.V4ProcessPartialUpdate.DecodeRemovals.UrlUws.Result"
+    enum="SafeBrowsingV4DecodeResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.DecodeRemovals.Result but for
+    UrlUws list specifically.
+  </summary>
+</histogram>
+
+<histogram
+    name="SafeBrowsing.V4ProcessPartialUpdate.DecodeRemovals.UrlUws.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.DecodeRemovals.Time but for
+    UrlUws list specifically.
+  </summary>
+</histogram>
+
 <histogram name="SafeBrowsing.V4ProcessPartialUpdate.MergeUpdate.Time"
     units="ms">
   <owner>vakh@chromium.org</owner>
@@ -51571,6 +51890,35 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram
+    name="SafeBrowsing.V4ProcessPartialUpdate.MergeUpdate.UrlMalware.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.MergeUpdate.Time but for
+    UrlMalware list specifically.
+  </summary>
+</histogram>
+
+<histogram
+    name="SafeBrowsing.V4ProcessPartialUpdate.MergeUpdate.UrlSoceng.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.MergeUpdate.Time but for
+    UrlSoceng list specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ProcessPartialUpdate.MergeUpdate.UrlUws.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.MergeUpdate.Time but for UrlUws
+    list specifically.
+  </summary>
+</histogram>
+
 <histogram name="SafeBrowsing.V4ProcessPartialUpdateTime" units="ms">
   <obsolete>
     Replaced by SafeBrowsing.V4ProcessPartialUpdate.ApplyUpdate.Time.
@@ -51606,6 +51954,60 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="SafeBrowsing.V4ReadFromDisk.ApplyUpdate.UrlMalware.Result"
+    enum="SafeBrowsingV4ApplyUpdateResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ReadFromDisk.ApplyUpdate.Result but for UrlMalware
+    list specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ReadFromDisk.ApplyUpdate.UrlMalware.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ReadFromDisk.ApplyUpdate.Time but for UrlMalware list
+    specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ReadFromDisk.ApplyUpdate.UrlSoceng.Result"
+    enum="SafeBrowsingV4ApplyUpdateResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ReadFromDisk.ApplyUpdate.Result but for UrlSoceng
+    list specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ReadFromDisk.ApplyUpdate.UrlSoceng.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ReadFromDisk.ApplyUpdate.Time but for UrlSoceng list
+    specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ReadFromDisk.ApplyUpdate.UrlUws.Result"
+    enum="SafeBrowsingV4ApplyUpdateResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ReadFromDisk.ApplyUpdate.Result but for UrlUws list
+    specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ReadFromDisk.ApplyUpdate.UrlUws.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ReadFromDisk.ApplyUpdate.Time but for UrlUws list
+    specifically.
+  </summary>
+</histogram>
+
 <histogram name="SafeBrowsing.V4ReadFromDisk.DecodeAdditions.Result"
     enum="SafeBrowsingV4DecodeResult">
   <owner>vakh@chromium.org</owner>
@@ -51624,6 +52026,60 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="SafeBrowsing.V4ReadFromDisk.DecodeAdditions.UrlMalware.Result"
+    enum="SafeBrowsingV4DecodeResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ProcessPartialUpdate.DecodeAdditions.Result but for
+    UrlMalware list specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ReadFromDisk.DecodeAdditions.UrlMalware.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ReadFromDisk.DecodeAdditions.Time but for UrlMalware
+    list specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ReadFromDisk.DecodeAdditions.UrlSoceng.Result"
+    enum="SafeBrowsingV4DecodeResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ReadFromDisk.DecodeAdditions.Result but for UrlSoceng
+    list specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ReadFromDisk.DecodeAdditions.UrlSoceng.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ReadFromDisk.DecodeAdditions.Time but for UrlSoceng
+    list specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ReadFromDisk.DecodeAdditions.UrlUws.Result"
+    enum="SafeBrowsingV4DecodeResult">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ReadFromDisk.DecodeAdditions.Result but for UrlUws
+    list specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ReadFromDisk.DecodeAdditions.UrlUws.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ReadFromDisk.DecodeAdditions.Time but for UrlUws list
+    specifically.
+  </summary>
+</histogram>
+
 <histogram name="SafeBrowsing.V4ReadFromDisk.MergeUpdate.Time" units="ms">
   <owner>vakh@chromium.org</owner>
   <summary>
@@ -51632,6 +52088,33 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="SafeBrowsing.V4ReadFromDisk.MergeUpdate.UrlMalware.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ReadFromDisk.MergeUpdate.Time but for UrlMalware list
+    specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ReadFromDisk.MergeUpdate.UrlSoceng.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ReadFromDisk.MergeUpdate.Time but for UrlSoceng list
+    specifically.
+  </summary>
+</histogram>
+
+<histogram name="SafeBrowsing.V4ReadFromDisk.MergeUpdate.UrlUws.Time"
+    units="ms">
+  <owner>vakh@chromium.org</owner>
+  <summary>
+    Same as SafeBrowsing.V4ReadFromDisk.MergeUpdate.Time but for UrlUws list
+    specifically.
+  </summary>
+</histogram>
+
 <histogram name="SafeBrowsing.V4ReadFromDiskTime" units="ms">
   <obsolete>
     Replaced by SafeBrowsing.V4ReadFromDisk.ApplyUpdate.Time.