[sql] Additional Raze() unit tests.

tools/metrics/histograms/histograms.xml

 <!--
 Copyright 2013 The Chromium Authors. All rights reserved.
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 -->
 
 <!--
 This file is used to generate a comprehensive list of Chrome histograms along
 with a detailed description for each histogram.
 
@@ skipping 11828 matching lines @@
 </histogram>
 
 <histogram name="Sqlite.History.Error" enum="SqliteErrorCode">
   <summary>Error codes returned by sqlite for the history db.</summary>
 </histogram>
 
 <histogram name="Sqlite.Quota.Error" enum="SqliteErrorCode">
   <summary>Error codes returned by sqlite for the quota db.</summary>
 </histogram>
 
+<histogram name="Sqlite.RazeDatabase" enum="SqliteErrorCode">
+  <summary>Errors attempting to Raze() database.</summary>
+</histogram>
+
+<histogram name="Sqlite.RazeDatabase2" enum="SqliteErrorCode">
+  <summary>Errors on second attempt to Raze() database.</summary>
+</histogram>
+
+<histogram name="Sqlite.RazeDatabaseTruncate" enum="SqliteErrorCode">
+  <summary>Errors truncating database for Raze().</summary>
+</histogram>
+
 <histogram name="Sqlite.SizeKB" units="Kb">
   <summary>Size in kilobytes of pre-existing database at startup.</summary>
 </histogram>
 
 <histogram name="Sqlite.Text.Error" enum="SqliteErrorCode">
   <summary>Error codes returned by sqlite the full text db.</summary>
 </histogram>
 
 <histogram name="Sqlite.Thumbnail.Error" enum="SqliteErrorCode">
   <summary>Error codes returned by sqlite for the thumbnail db.</summary>
@@ skipping 9586 matching lines @@
   <group name="Disabled" label="Neither extra webstore link is visible"/>
   <group name="FooterLink" label="Link in bottom right of footer"/>
   <group name="PlusIcon" label="Plus icon in apps page"/>
   <affected-histogram name="Extensions.AppLaunch"/>
   <affected-histogram name="NewTabPage.DefaultPageType"/>
 </fieldtrial>
 
 </fieldtrials>
 
 </histogram-configuration>