[Downloads] Handle externally deleted items

chrome/android/java/strings/android_chrome_strings.grd

Index: chrome/android/java/strings/android_chrome_strings.grd
diff --git a/chrome/android/java/strings/android_chrome_strings.grd b/chrome/android/java/strings/android_chrome_strings.grd
index af78754e80a0a7510276a7c4dbc9bd49f8249ffe..41a1679e792c126b00fb38f5dc524d332aa99815 100644
--- a/chrome/android/java/strings/android_chrome_strings.grd
+++ b/chrome/android/java/strings/android_chrome_strings.grd
@@ -1669,6 +1669,9 @@ To obtain new licenses, connect to the internet and play your downloaded content
       <message name="IDS_DOWNLOAD_CANT_OPEN_FILE" desc="Toast that appears when a downloaded file can't be opened.">
         Can't open file
       </message>
+      <message name="IDS_DOWNLOAD_CANT_SHARE_DELETED" desc="Toast that appears when the user attempts to share downloaded files that have been deleted.">
+        Can't share deleted files
+      </message>
       <message name="IDS_DOWNLOAD_NOTIFICATION_PAUSE_BUTTON" desc="Text on the button that pauses a download.">
         Pause
       </message>
@@ -1789,6 +1792,9 @@ To obtain new licenses, connect to the internet and play your downloaded content
       <message name="IDS_DOWNLOAD_PAGE" desc="Download this page.">
         Download page
       </message>
+      <message name="IDS_DOWNLOAD_MANAGER_UI_DELETED" desc="Indicates that a downloaded file has been deleted.">
+        Deleted
+      </message>
 
       <!-- Document mode messages -->
       <message name="IDS_CLOSE_ALL_INCOGNITO_NOTIFICATION" desc="Message on the notification that closes all incognito tabs in document mode">