[Smart Lock, Settings Reconciliation] Histograms for tracking initial and final pref values.

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 045072efd97d7e12fa54cab2916616578f86a011..a21a9ba1c06a5814748bd0d42f12c818d5ee3ef6 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -30281,6 +30281,19 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="PasswordManager.SettingsReconciliation.InitialAndFinalValues"
+    enum="PasswordManagerPreferencesInitialAndFinalValues">
+  <owner>engedy@chromium.org</owner>
+  <owner>melandory@chromium.org</owner>
+  <summary>
+    Tracks the pair of initial values and pair of final values for the legacy
+    preference for controlling the Chrome Password Manager and the new
+    preference for controlling Smart Lock on Android. A single sample is
+    recorded after sync has merged last snaphot and finished initialization for
+    sync users, and on profile initialization for non-sync users.
+  </summary>
+</histogram>
+
 <histogram name="PasswordManager.SettingsReconciliation.InitialValues"
     enum="PasswordManagerPreferencesInitialValues">
   <owner>engedy@chromium.org</owner>
@@ -66995,6 +67008,47 @@ To add a new entry, add it with any value and run test to compute valid value.
       label="Password status not checked as user is on a Windows Domain"/>
 </enum>
 
+<enum name="PasswordManagerPreferencesInitialAndFinalValues" type="int">
+  <summary>
+    The pair initial values and the pair of final values for the legacy

[rkaplow, 2015/09/29 22:51:55]

pair of

[melandory, 2015/10/02 08:21:36]

Done.

+    preference for controlling the Chrome Password Manager and new preference
+    for controlling Smart Lock on Android. In the values label N means new pref
+    value, L meand legacy pref value.
+  </summary>
+  <int value="0"
+      label="Initial state: N='off', L='off' Final state: N='off', L='off'"/>
+  <int value="1"
+      label="Initial state: N='off', L='off' Final state: N='off', L='on'"/>
+  <int value="2"
+      label="Initial state: N='off', L='off' Final state: N='on', L='off'"/>
+  <int value="3"
+      label="Initial state: N='off', L='off' Final state: N='on', L='on'"/>
+  <int value="4"
+      label="Initial state: N='off', L='on' Final state: N='off', L='off'"/>
+  <int value="5"
+      label="Initial state: N='off', L='on' Final state: N='off', L='on'"/>
+  <int value="6"
+      label="Initial state: N='off', L='on' Final state: N='on', L='off'"/>
+  <int value="7"
+      label="Initial state: N='off', L='on' Final state: N='on', L='on'"/>
+  <int value="8"
+      label="Initial state: N='on', L='off' Final state: N='off', L='off'"/>
+  <int value="9"
+      label="Initial state: N='on', L='off' Final state: N='off', L='on'"/>
+  <int value="10"
+      label="Initial state: N='on', L='off' Final state: N='on', L='off'"/>
+  <int value="11"
+      label="Initial state: N='on', L='off' Final state: N='on', L='on'"/>
+  <int value="12"
+      label="Initial state: N='on', L='on' Final state: N='off', L='off'"/>
+  <int value="13"
+      label="Initial state: N='on', L='on' Final state: N='off', L='on'"/>
+  <int value="14"
+      label="Initial state: N='on', L='on' Final state: N='on', L='off'"/>
+  <int value="15"
+      label="Initial state: N='on', L='on' Final state: N='on', L='on'"/>
+</enum>
+
 <enum name="PasswordManagerPreferencesInitialValues" type="int">
   <summary>
     The pair of initial values for the legacy preference for controlling the