[Downloads] Some UMA for downloads resumption.

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 15492 matching lines @@
   <int value="4" label="Initiated by Renderer (Obsolete)"/>
   <int value="5" label="Initiated and Unthrottled"/>
   <int value="6" label="Completed"/>
   <int value="7" label="Cancelled"/>
   <int value="8" label="Started"/>
   <int value="9" label="Interrupted"/>
   <int value="10" label="Calls to AppendDataToFile (Size)"/>
   <int value="11" label="Calls to AppendDataToFile (Count)"/>
   <int value="12" label="Interrupted at End of Download"/>
   <int value="13" label="Attempt to Append to Detached File"/>
+  <int value="14" label="File Missing After Successful Scan"/>
+  <int value="15" label="Supports ranges and strong validation"/>
+  <int value="16" label="No WebContents at interruption"/>
 </enum>
 
 <enum name="DownloadDatabaseRecordDroppedType" type="int">
   <int value="0" label="Bad State"/>
   <int value="1" label="Bad Danger Type"/>
 </enum>
 
 <enum name="DownloadDOMEvent" type="int">
   <int value="0" label="GetDownloads"/>
   <int value="1" label="OpenFile"/>
@@ skipping 62 matching lines @@
   <int value="2" label="Finished"/>
   <int value="3" label="Write to already completed file"/>
   <int value="4" label="Write to already failed file"/>
 </enum>
 
 <enum name="DownloadSource" type="int">
   <int value="0" label="Initiated by Save Package on Non-HTML content"/>
   <int value="1" label="Initiated by Drag-and-drop"/>
   <int value="2" label="Initiated by RPC from Renderer"/>
   <int value="3" label="Initiated by Save from Pepper"/>
+  <int value="4" label="Initiated by Resumption"/>
 </enum>
 
 <enum name="DriveCacheDBOpenStatus" type="int">
   <int value="0" label="Success"/>
   <int value="1" label="Corrupt database"/>
   <int value="2" label="Unknown recoverable failure"/>
   <int value="3" label="Unrecoverable (disk full?) failure"/>
 </enum>
 
 <enum name="DriveEntryKind" type="int">
@@ skipping 2116 matching lines @@
   <int value="0" label="NONE"/>
   <int value="1" label="FILE_FAILED"/>
   <int value="2" label="FILE_ACCESS_DENIED"/>
   <int value="3" label="FILE_NO_SPACE"/>
   <int value="5" label="FILE_NAME_TOO_LONG"/>
   <int value="6" label="FILE_TOO_LARGE"/>
   <int value="7" label="FILE_VIRUS_INFECTED"/>
   <int value="10" label="FILE_TRANSIENT_ERROR"/>
   <int value="11" label="FILE_BLOCKED"/>
   <int value="12" label="FILE_SECURITY_CHECK_FAILED"/>
+  <int value="13" label="FILE_TOO_SHORT"/>
   <int value="20" label="NETWORK_FAILED"/>
   <int value="21" label="NETWORK_TIMEOUT"/>
   <int value="22" label="NETWORK_DISCONNECTED"/>
   <int value="23" label="NETWORK_SERVER_DOWN"/>
   <int value="30" label="SERVER_FAILED"/>
   <int value="31" label="SERVER_NO_RANGE"/>
   <int value="32" label="SERVER_PRECONDITION"/>
   <int value="33" label="SERVER_BAD_CONTENT"/>
   <int value="40" label="USER_CANCELED"/>
   <int value="41" label="USER_SHUTDOWN"/>
@@ skipping 5824 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>