Omnibox Metrics - Record Age of Clipboard Suggestions Shown

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 af76124e3f2389866917674958835fb385c08e5d..22ed6adde0e3c01c3048de04f636b5d3ca3d7236 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -44341,6 +44341,18 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Omnibox.ClipboardSuggestionShownAge" units="ms">
+  <owner>mpearson@chromium.org</owner>
+  <summary>
+    Recorded every time the omnibox is focussed and a recent URL from the user's
+    clipboard is suggested.  The value indicates the estimated age of the
+    clipboard.  (If Chrome observed the clipboard modification, this age is
+    exact.  If Chrome did not observe the modification, then it's a conservative
+    estimate: the last time Chrome observed a clipboard modification, which is
+    certainly older than the current clipboard.)
+  </summary>
+</histogram>
+
 <histogram name="Omnibox.ClipboardSuggestionShownWithCurrentURL"
     enum="BooleanPresent">
   <owner>mpearson@chromium.org</owner>