Android: use grit target platform instead of define.

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 2de2843c46ac041c4f3ce3c9af7609363615d059..9b12c83cc4f34136a181aa96205d306c4b166abb 100644
--- a/chrome/app/bookmarks_strings.grdp
+++ b/chrome/app/bookmarks_strings.grdp
@@ -1,12 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- Bookmarks specific strings (included from generated_resources.grd). -->
 <grit-part>
-  <if expr="not pp_ifdef('android') and not pp_ifdef('ios') and pp_ifdef('use_titlecase')">
+  <if expr="not is_android and not pp_ifdef('ios') and pp_ifdef('use_titlecase')">
     <message name="IDS_BOOKMARK_BAR_FOLDER_NAME" desc="In Title Case: Name shown in the tree for the Bookmarks Bar folder.">
       Bookmarks Bar
     </message>
   </if>
-  <if expr="not pp_ifdef('android') and not pp_ifdef('ios') and not pp_ifdef('use_titlecase')">
+  <if expr="not is_android and not pp_ifdef('ios') and not pp_ifdef('use_titlecase')">
     <message name="IDS_BOOKMARK_BAR_FOLDER_NAME" desc="Name shown in the tree for the Bookmarks Bar folder.">
       Bookmarks bar
     </message>
@@ -61,7 +61,7 @@
       Show Apps Shortcut
     </message>
   </if>
-  <if expr="pp_ifdef('android')">
+  <if expr="is_android">
     <message name="IDS_BOOKMARK_BAR_FOLDER_NAME" desc="Mobile: Name shown in the tree for the desktop bookmarks folder">
       Desktop bookmarks
     </message>
@@ -379,7 +379,7 @@
   </message>
   <!-- End of Bookmark Star button strings. -->
 
-  <if expr="pp_ifdef('android')">
+  <if expr="is_android">
     <message name="IDS_BOOKMARK_EDIT_FOLDER" desc="Context menu item for editing a bookmark folder">
       Edit folder
     </message>