Read later: Add a type for reading list bookmarks.

This CL adds a Android bookmark type for reading list, so we can
distinguish reading list bookmarks in UI and fork calls into reading
list backend.

Bug: 1128074
Change-Id: I8ceb198bcca68c794d7a044210a73b97679fce07
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2415589Reviewed-by: David Trainor <dtrainor@chromium.org>
Reviewed-by: Theresa  <twellington@chromium.org>
Commit-Queue: Xing Liu <xingliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809021}

components/bookmarks/common/android/bookmark_type.h

@@ -14,8 +14,9 @@ namespace bookmarks {
 enum BookmarkType {
   BOOKMARK_TYPE_NORMAL,
   BOOKMARK_TYPE_PARTNER,
+  BOOKMARK_TYPE_READING_LIST,
   // BOOKMARK_TYPE_LAST must be the last element.
-  BOOKMARK_TYPE_LAST = BOOKMARK_TYPE_PARTNER,
+  BOOKMARK_TYPE_LAST = BOOKMARK_TYPE_READING_LIST,
 };
 }
 

tools/metrics/histograms/enums.xml

@@ -7076,6 +7076,7 @@ Called by update_bad_message_reasons.py.-->
 <enum name="BookmarkType">
   <int value="0" label="Normal"/>
   <int value="1" label="Partner"/>
+  <int value="2" label="ReadingList"/>
 </enum>
 
 <enum name="Boolean">