Use plural formats and native digits

chrome/app/bookmarks_strings.grdp

Index: chrome/app/bookmarks_strings.grdp
diff --git a/chrome/app/bookmarks_strings.grdp b/chrome/app/bookmarks_strings.grdp
index b6daec1b95f1bcc52d23f2f2b3618fc8ab440c7e..2a496e9065cbc663b2ddb2c6efbaafe4cdaf7521 100644
--- a/chrome/app/bookmarks_strings.grdp
+++ b/chrome/app/bookmarks_strings.grdp
@@ -142,8 +142,11 @@
       </message>
     </if>
   </if>
-  <message name="IDS_BOOKMARK_BAR_SHOULD_OPEN_ALL" desc="Message in the message box shown if user asks to open a lot of bookmarks in a folder">
-    Are you sure you want to open <ph name="TAB_COUNT">$1<ex>20</ex></ph> tabs?
+  <message name="IDS_BOOKMARK_BAR_SHOULD_OPEN_ALL" desc="Message in the message box shown if user asks to open a lot of bookmarks in a folder. The number will never be 1. [ICU Syntax]">
+  {TAB_COUNT, plural,
+   one{Are you sure you want to open # tab?}
+   other{Are you sure you want to open # tabs?}
+  }
   </message>
   <!-- End of Bookmarks Bar Context Menu strings. -->
 
@@ -221,8 +224,10 @@
   <message name="IDS_BOOKMARK_EDITOR_NEW_FOLDER_MENU_ITEM" desc="Text on the new folder context menu item.">
     &amp;New folder
   </message>
-  <message name="IDS_BOOKMARK_EDITOR_CONFIRM_DELETE" desc="The message shown in the dialog asking the user to confirm deleting a folder.">
-    This folder contains <ph name="COUNT">$1<ex>5</ex></ph> bookmarks. Are you sure you want to delete it?
+  <message name="IDS_BOOKMARK_EDITOR_CONFIRM_DELETE" desc="The message shown in the dialog asking the user to confirm deleting a folder. [ICU Syntax]">
+    {NUM_BOOKMARKS, plural,
+     =1 {This folder contains a bookmark. Are you sure you want to delete it?}
+     =other {This folder contains # bookmarks. Are you sure you want to delete it?}}
   </message>
   <message name="IDS_BOOKMARK_FOLDER_EDITOR_WINDOW_TITLE" desc="Window title of editor for bookmark folders">
     Edit folder name