UMA Metrics for the user menu, including vasquette-detection

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 04892de6e684a90e23350387f8546182405635c8..89f6d88f2409710ea92dac906ff4e7d219a25d36 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -20506,6 +20506,15 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="Profile.DesktopSignout" enum="ProfileDesktopSignout">
+  <owner>mlerman@chromium.org</owner>
+  <summary>
+    Track user interactions that can be performed in the user menu and user
+    manager, including whether the interaction began from the vasquette or the
+    avatar button.
+  </summary>
+</histogram>
+
 <histogram name="Profile.ExtensionSize" units="MB">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <summary>Size of the extension cookies database.</summary>
@@ -39891,6 +39900,50 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <int value="4" label="Canceled"/>
 </enum>
 
+<enum name="ProfileDesktopSignout" type="int">
+  <int value="0" label="Locked In Menu from Button">
+    <summary>User opened the user menu directly, and clicked lock.</summary>
+  </int>
+  <int value="1" label="Switch Profiles in Menu from Button">
+    <summary>
+      User opened the user menu directly, and switched profiles.
+    </summary>
+  </int>
+  <int value="2" label="Remove Account in Menu from Button.">
+    <summary>
+      User opened the user menu directly, and started removing an account.
+    </summary>
+  </int>
+  <int value="3" label="Add Account in Menu from Button">
+    <summary>
+      User opened the user menu directly, and started adding an account.
+    </summary>
+  </int>
+  <int value="4" label="Unused"/>
+  <int value="5" label="Locked in Menu from Vasquette">
+    <summary>
+      User clicked on vasquette, went to the user menu, and clicked lock.
+    </summary>
+  </int>
+  <int value="6" label="Switch Profiles in Menu from Vasquette">
+    <summary>
+      User clicked on vasquette, went to the user menu, and switched profiles.
+    </summary>
+  </int>
+  <int value="7" label="Remove Account in Menu from Vasquette">
+    <summary>
+      User clicked on vasquette, went to the user menu, and started removing an
+      account.
+    </summary>
+  </int>
+  <int value="8" label="Add Account in Menu from Vasquette">
+    <summary>
+      User clicked on vasquette, went to the user menu, and started adding an
+      account.
+    </summary>
+  </int>
+</enum>
+
 <enum name="ProfileErrorType" type="int">
   <int value="0" label="History error"/>
   <int value="1" label="Preferences error"/>