Setting chrome as the default browser is now fixed on Windows 10

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 97671a2a122d20d5d2ba37f4dffc25c238d9aea0..be9a63e5f23b0069c85eeab50373148e4c2ccd64 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -6055,6 +6055,24 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="DefaultBrowser.AsyncSetAsDefault.Duration"
+    units="milliseconds">
+  <owner>pmonette@chromium.org</owner>
+  <summary>
+    How long it took to set Chrome as the default browser asynchronously in
+    Windows 10+.
+  </summary>
+</histogram>
+
+<histogram name="DefaultBrowser.AsyncSetAsDefault.Result"
+    enum="DefaultBrowserAsyncAttemptResult">
+  <owner>pmonette@chromium.org</owner>
+  <summary>
+    The count of how many times users were successfully able to set Chrome as
+    the default browser asynchronously in Windows 10+.
+  </summary>
+</histogram>
+
 <histogram name="DefaultBrowser.InteractionResult"
     enum="MakeChromeDefaultResult">
   <owner>gab@chromium.org</owner>
@@ -54287,6 +54305,31 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="6" label="kImageBMP"/>
 </enum>
 
+<enum name="DefaultBrowserAsyncAttemptResult" type="int">
+  <int value="0" label="Success">No errors encountered.</int>
+  <int value="1" label="Already default">
+    Chrome was already the default web client. This counts as a successful
+    attempt.
+  </int>
+  <int value="2" label="Failure">
+    Chrome was not set as the default web client.
+  </int>
+  <int value="3" label="Abandoned">
+    The attempt was abandoned because the observer was destroyed.
+  </int>
+  <int value="4" label="Launch failure">
+    Failed to launch the process to set Chrome as the default web client
+    asynchronously.
+  </int>
+  <int value="5" label="Other worker">
+    Another worker is already in progress to make Chrome the default web client.
+  </int>
+  <int value="6" label="Retry">
+    The user initiated another attempt while the asynchronous operation was
+    already in progress.
+  </int>
+</enum>
+
 <enum name="DefaultBrowserState" type="int">
   <int value="0" label="Not Default"/>
   <int value="1" label="Default"/>