Instrument "Remove this person" in user manager.

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 0cb8649f23eea05b2aed352551d059f8eaa5ab2b..825c8ca7f316304ab4dfaa2c357b4a4474795917 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -56978,8 +56978,16 @@ To add a new entry, add it with any value and run test to compute valid value.
 </enum>
 
 <enum name="ProfileDeleteAction" type="int">
-  <int value="0" label="Settings Page"/>
-  <int value="1" label="User Manager"/>
+  <int value="0" label="Settings Page">
+    A profile was deleted from the settings page.
+  </int>
+  <int value="1" label="User Manager">
+    A profile was deleted from the User Manager.
+  </int>
+  <int value="2" label="User Manager Warning Shown">
+    The user clicked "Remove this person" in the user manager and was shown the
+    profile deletion warning.

[jwd, 2015/03/18 21:14:21]

So, if the user actually deletes, this will be followed by the a "Settings Page"
value being logged too, right?

I might tweak the Profile.DeleteProfileAction histogram description a bit, as it
implies that it tracks actions that would trigger a deletion attempt (assuming
my interpretation of this enum value). Also, maybe add yourself as an owner, if
you're comfortable.

[anthonyvd, 2015/03/18 21:56:56]

Actually it would be the "User Manager" value being logged next but I was just
asked to add something similar for the settings page as well. Basically the idea
is that those warnings are probably going to be tweaked and this histogram will
help us track the changes in the amount of users who keep going after seeing the
warning.

I'll definitely follow your advice and tweak the description/add myself as an
owner. Thanks!

(Done.)

+  </int>
 </enum>
 
 <enum name="ProfileDesktopMenu" type="int">