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 22d3a66c2235d6fc4e31ca793faf991648ea670c..13356ef0d7168b95c0e3a8d73fc3d53d05ff4611 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -29824,6 +29824,21 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="MobileOmnibox.PressedClipboardSuggestionAge" units="ms">
+  <owner>jif@chromium.org</owner>
+  <owner>mpearson@chromium.org</owner>
+  <summary>
+    When a user presses an omnibox suggestion based on the content of the
+    clipboard, this histograms records how long ago Chrome detected a change in
+    the clipboard.
+
+    Intended to be compared to Omnibox.ClipboardSuggestionShownAge.
+
+    If Chrome never detected a change to the clipboard, no clipboard suggestion
+    is shown, meaning this histogram will never be emitted to.
+  </summary>
+</histogram>
+
 <histogram name="MobileStartup.MainIntentAction" enum="MobileStartingAction">
   <owner>mariakhomenko@chromium.org</owner>
   <summary>
@@ -44341,6 +44356,22 @@ 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.  If Chrome never observed a
+    clipboard modification, no clipboard suggestion is shown, meaning this
+    histogram will never be emitted to.)
+
+    Intended to be compared with MobileOmnibox.PressedClipboardSuggestionAge.
+  </summary>
+</histogram>
+
 <histogram name="Omnibox.ClipboardSuggestionShownWithCurrentURL"
     enum="BooleanPresent">
   <owner>mpearson@chromium.org</owner>