Add metrics for tracking LoginDatabase::Init failure.

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 526cb57dbb41c4042c291f989aec1c4b980f1504..6e7648f50da189725a680b567f2487a086ec6ba3 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -28730,6 +28730,19 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="PasswordManager.LoginDatabaseFailedVersion">
+  <owner>vasilii@chromium.org</owner>
+  <summary>
+    The version of LoginDatabase if the migration to a new one failed.
+  </summary>
+</histogram>
+
+<histogram name="PasswordManager.LoginDatabaseInit"
+    enum="LoginDatabaseInitError">
+  <owner>vasilii@chromium.org</owner>
+  <summary>An error on LoginDatabase initialization.</summary>
+</histogram>
+
 <histogram name="PasswordManager.NumPasswordsDeletedByBulkDelete">
   <owner>vabr@chromium.org</owner>
   <summary>
@@ -62323,6 +62336,18 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="2137599770" label="enable-win32k-renderer-lockdown"/>
 </enum>
 
+<enum name="LoginDatabaseInitError" type="int">
+  <int value="0" label="Init success"/>
+  <int value="1" label="Can't open file"/>
+  <int value="2" label="Start transaction error"/>
+  <int value="3" label="Meta table failed initialization"/>
+  <int value="4" label="Incompatible current version"/>
+  <int value="5" label="Logins table failed initialization"/>
+  <int value="6" label="Stats table failed initialization"/>
+  <int value="7" label="Migration error"/>
+  <int value="8" label="Commit transaction error"/>
+</enum>
+
 <enum name="LoginFailureReason" type="int">
   <int value="0" label="NONE">None</int>
   <int value="1" label="COULD_NOT_MOUNT_CRYPTOHOME">