Use new download notification strings

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 bac17747447f989eeeed35a9d733779f00f47190..f1b9b55926f16907021a06bdceb2b0b0acf0ebaf 100644
--- a/chrome/android/java/strings/android_chrome_strings.grd
+++ b/chrome/android/java/strings/android_chrome_strings.grd
@@ -1624,6 +1624,12 @@ To obtain new licenses, connect to the internet and play your downloaded content
       <message name="IDS_DOWNLOAD_NOTIFICATION_PAUSED" desc="Download notification to be displayed when a download pauses.">
         Download paused
       </message>
+      <message name="IDS_DOWNLOAD_NOTIFICATION_PENDING" desc="Download notification to be displayed when a download is pending.">

[dewittj, 2016/11/09 23:05:24]

The translators may not know what "pending" means in this context, we could give
them some help with more information.  "when a download is pending - meaning the
download has been accepted but we are not yet fetching the request from the
network"

[qinmin, 2016/11/10 19:07:25]

Done.

+        Download pending...
+      </message>
+      <message name="IDS_DOWNLOAD_NOTIFICATION_WAITING" desc="Download notification to be displayed when a download is waiting for connection.">
+        Download waiting...
+      </message>
       <message name="IDS_DOWNLOAD_CANT_OPEN_FILE" desc="Toast that appears when a downloaded file can't be opened.">
         Can't open file
       </message>
@@ -1654,7 +1660,7 @@ To obtain new licenses, connect to the internet and play your downloaded content
       <message name="IDS_DOWNLOAD_FAILED_REASON_UNKNOWN_ERROR" desc="Message to explain that the download failed because unkown error.">
         <ph name="FILE_NAME">%1$s<ex>http://abc.com/test.pdf</ex></ph> download failed due to an unknown error.
       </message>
-      <message name="IDS_DOWNLOAD_PENDING" desc="Message in the list of items which have received download requests telling their status. This message states that the download has not yet begun [CHAR LIMIT=30]">
+      <message name="IDS_DOWNLOAD_STARTED" desc="Message to show when download has started [CHAR LIMIT=30]">
         Downloading…
       </message>
       <message name="IDS_DOWNLOAD_SUCCEEDED_MESSAGE" desc="Transient message shown when a file download has succeeded." meaning="Android">