UMA metrics - number of accounts per profile and account reconciler.

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 745be182ff365e83f17293621560a2ecb1c2fc83..550e8efad1461de5ecedb079207346558ac85639 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -26,7 +26,7 @@ three sections:
   works.
 
 Each histogram_suffixes tag lists the histograms that it affects. The complete
-list of histograms is computed by appending (or prepending - see blow) the
+list of histograms is computed by appending (or prepending - see below) the
 histogram_suffixes suffix names to each of the affected histograms. For example,
 define the following:
 
@@ -20497,6 +20497,15 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="Profile.NumberOfAccountsPerProfile">
+  <owner>mlerman@chromium.org</owner>
+  <summary>
+    Counts the number of Google-managed accounts linked to a profile. This may
+    be counted multiple times per profile. Please review with the &quot;Show
+    user counts&quot; option enabled on the dashboard.
+  </summary>
+</histogram>
+
 <histogram name="Profile.NumberOfManagedProfiles">
   <owner>pam@chromium.org</owner>
   <summary>
@@ -23349,6 +23358,56 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="Signin.Reconciler.AddedToChromeFirstRun">
+  <owner>mlerman@chromium.org</owner>
+  <summary>
+    After the first execution of the account reconciler, how many accounts were
+    added to the browser's token service because they were in the cookie jar.
+  </summary>
+</histogram>
+
+<histogram name="Signin.Reconciler.AddedToChromeSubsequentRun">
+  <owner>mlerman@chromium.org</owner>
+  <summary>
+    After any non-initial execution of the account reconciler, how many accounts
+    were added to the browser's token service because they were in the cookie
+    jar.
+  </summary>
+</histogram>
+
+<histogram name="Signin.Reconciler.AddedToCookieJarFirstRun">
+  <owner>mlerman@chromium.org</owner>
+  <summary>
+    After the first execution of the account reconciler, how many accounts were
+    added to the cookie jar because they were in the browser's token service.
+  </summary>
+</histogram>
+
+<histogram name="Signin.Reconciler.AddedToCookieJarSubsequentRun">
+  <owner>mlerman@chromium.org</owner>
+  <summary>
+    After any non-initial execution of the account reconciler, how many accounts
+    were added to the cookie jar because they were in the browser's token
+    service.
+  </summary>
+</histogram>
+
+<histogram name="Signin.Reconciler.DifferentPrimaryAccountsFirstRun">
+  <owner>mlerman@chromium.org</owner>
+  <summary>
+    After the first execution of the account reconciler, true if the token
+    service and cookie jar contained different primary accounts.
+  </summary>
+</histogram>
+
+<histogram name="Signin.Reconciler.DifferentPrimaryAccountsSubsequentRun">

[Alexei Svitkine (slow), 2014/05/09 20:18:20]

Simply have single entry which should be
Signin.Reconciler.DifferentPrimaryAccounts and only entry. The suffixes tag will
create two out of these. Same for the others.

[Mike Lerman, 2014/05/09 20:24:49]

Err... yes.

+  <owner>mlerman@chromium.org</owner>
+  <summary>
+    After any non-initial execution of the account reconciler, true if the token
+    service and cookie jar contained different primary accounts.
+  </summary>
+</histogram>
+
 <histogram name="SimpleCache.App.CheckCRCResult" enum="CheckCRCResult">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <summary>
@@ -45419,6 +45478,18 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <affected-histogram name="Extensions.UpdateSource"/>
 </histogram_suffixes>
 
+<histogram_suffixes name="Signin.Reconciler">
+  <suffix name="FirstRun"
+      label="First execution of the reconciler after the profile was loaded
+             or the new_profile_management flag was toggled."/>
+  <suffix name="SubsequentRun"
+      label="Execution of the reconciler triggered by some other change of
+             state."/>
+  <affected-histogram name="Signin.Reconciler.AddedToCookieJar"/>
+  <affected-histogram name="Signin.Reconciler.DifferentPrimaryAccounts"/>

[Alexei Svitkine (slow), 2014/05/09 20:18:20]

You're missing AddedToChrome here and duplicating this one.

[Mike Lerman, 2014/05/09 20:24:49]

Thanks for catching the copy-paste.

+  <affected-histogram name="Signin.Reconciler.DifferentPrimaryAccounts"/>
+</histogram_suffixes>
+
 <histogram_suffixes name="SocketType">
   <suffix name="HTTPProxy" label="HTTP proxy socket"/>
   <suffix name="SOCK" label="SOCKS socket"/>