Add UMA tracking to "Recently Closed" submenu.

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 7d952ed139cc9ed3515e8ff11ac3e10a4f0e7851..3b1a7c827369c1e2e2bb2712b4dea66e3d3f521e 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -10343,6 +10343,13 @@ other types of suffix sets.
   </summary>
 </histogram>
 
+<histogram name="WrenchMenu.RecentTabsSubMenu" enum="RecentTabsAction">
+  <summary>
+    The number of times each tab or window restore option in the Recent Tabs
+    submenu is clicked.
+  </summary>
+</histogram>
+
 <histogram name="ZeroSuggest.AllResults">
   <summary>
     The number of results (either query or URL) from ZeroSuggest. This is set
@@ -14696,6 +14703,13 @@ other types of suffix sets.
   <int value="3" label="FAILED"/>
 </enum>
 
+<enum name="RecentTabsAction" type="int">
+  <int value="0" label="Local Session Tab"/>
+  <int value="1" label="Other Device Tab"/>
+  <int value="2" label="Restore Window"/>
+  <int value="3" label="Show More"/>
+</enum>
+
 <enum name="ResolutionCategory" type="int">
   <int value="0" label="RESOLVE_SUCCESS"/>
   <int value="1" label="RESOLVE_FAIL"/>