Change "Read" header in Reading List

ios/chrome/app/strings/ios_strings.grd

Index: ios/chrome/app/strings/ios_strings.grd
diff --git a/ios/chrome/app/strings/ios_strings.grd b/ios/chrome/app/strings/ios_strings.grd
index bee35d9e21a2fc867b0e37a47c38d5d934cd7ebc..f6cdcce6836df437b48a5e55b21a8605b37e5361 100644
--- a/ios/chrome/app/strings/ios_strings.grd
+++ b/ios/chrome/app/strings/ios_strings.grd
@@ -1074,8 +1074,8 @@ Handoff must also be enabled in the General section of Settings, and your device
       <message name="IDS_IOS_READING_LIST_MARK_UNREAD_BUTTON" desc="Label of the button to mark selected reading list entries as 'Unread' [Length: 15em]" meaning="Mark selected entries as unread. [Length: 15em]">
         Mark Unread
       </message>
-      <message name="IDS_IOS_READING_LIST_READ_HEADER" desc="Header for the list containing the read reading list entries" meaning="The entries below this header are read. [Length: 15em]">
-        Read
+      <message name="IDS_IOS_READING_LIST_READ_HEADER" desc="Heading. Appears above a list of articles the user has already read, in their Reading List. Appears on the same page as an 'Unread' heading, which contains articles the user hasn't read yet. In English, 'Read' can be both verb and adjective so we needed to be more explicit. Does not need to be translated literally. [Length: 40em]" meaning="The entries below this header are read. [Length: 40em]">
+        Articles you've read

[marq (ping after 24h), 2016/12/13 10:26:45]

I'm worried about consistency with the rest of the UI here; we have "Mark Read",
"Mark Unread", and then "Unread", so it seems that in context "Read" is fine. Is
the issue that this was mistranslated into a verb in some languages? 

This seems like the kind of thing that a UX writer would be able to help with.

[gambard, 2016/12/13 10:28:46]

It was asked my mardini@ (see bug).

       </message>
       <message name="IDS_IOS_READING_LIST_UNREAD_HEADER" desc="Header for the list containing the unread reading list entries" meaning="The entries below this header are unread. [Length: 15em]">
         Unread