Log UpdateJumpList() and CreateIconFiles() execution time to UMA

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 7e5b2162dc2b7af8ef1ed9414c85ea91828d46b4..638ac35835fa4c7fc3f19c73202c188ad180f4ca 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -81553,6 +81553,22 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <summary>The type of category clicked in the Windows Jumplist</summary>
 </histogram>
 
+<histogram name="WinJumplist.CreateIconFilesCount">
+  <owner>chengx@chromium.org</owner>
+  <summary>
+    Count of jumplist icons that will be created per jumplist update. It is
+    recorded whenever UpdateJumpList() is called.
+  </summary>
+</histogram>
+
+<histogram name="WinJumplist.CreateIconFilesDuration" units="ms">
+  <owner>chengx@chromium.org</owner>
+  <summary>
+    Time spent in CreateIconFiles(). This method is called whenever there is a
+    jumplist update and the JumpListIcons folder is empty.
+  </summary>
+</histogram>
+
 <histogram name="WinJumplist.DeleteStatusJumpListIcons"
     enum="JumplisticonsDeleteCategory">
   <owner>chengx@chromium.org</owner>
@@ -81679,6 +81695,14 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="WinJumplist.UpdateJumpListDuration" units="ms">
+  <owner>chengx@chromium.org</owner>
+  <summary>
+    Time spent in UpdateJumpList(). This method is called whenever there is a
+    jumplist update.
+  </summary>
+</histogram>
+
 <histogram name="WinTimeTicks.FailedToChangeCores" enum="WindowsVersion">
   <obsolete>
     Removed 01/2017.