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 7d4422f1b09f21de0c3d1d04cae4bf5dfd2dfcf6..26d6b377c575497431141469148a78feb49c3ac1 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -39080,6 +39080,14 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="NewTabPage.ContentSuggestions.UIUpdateStatus"
+    enum="UIUpdateStatus">
+  <owner>jkrcal@chromium.org</owner>
+  <summary>
+    Android: The result of updating the list of suggestions in the UI.
+  </summary>
+</histogram>
+
 <histogram name="NewTabPage.ContentSuggestions.UsageTimeLocal">
   <owner>markusheintz@chromium.org</owner>
   <summary>
@@ -107081,6 +107089,14 @@ value.
   <int value="36" label="Tap unconfirmed"/>
 </enum>
 
+<enum name="UIUpdateStatus" type="int">

[rkaplow, 2017/01/17 23:12:12]

nit, might add NewTabPage to the enum name

[dgn, 2017/01/18 11:27:55]

or ContentSuggestions, since we won't always stay on the NTP

[jkrcal, 2017/01/19 18:31:47]

Done.

+  <int value="0" label="Non-empty list set for the first time"/>
+  <int value="1" label="List updated (completely)"/>
+  <int value="2" label="List updated (expect for the first item)"/>
+  <int value="3" label="Update not possible (list already seen)"/>
+  <int value="4" label="List updates disabled"/>
+</enum>
+
 <enum name="UmaCleanExitConsistency" type="int">
   <int value="0" label="Dirty/Dirty (Registry/Local State)"/>
   <int value="1" label="Dirty/Clean (Registry/Local State)"/>