[Sync] Remove --create-mobile-bookmarks-folder

chrome/browser/sync/protocol/sync.proto

Index: chrome/browser/sync/protocol/sync.proto
diff --git a/chrome/browser/sync/protocol/sync.proto b/chrome/browser/sync/protocol/sync.proto
index 41ef93302e99faec688e4717b9d228857c8e43f5..bc866fe2c2f2770bd58b61cabdd2ca88a136ebbd 100644
--- a/chrome/browser/sync/protocol/sync.proto
+++ b/chrome/browser/sync/protocol/sync.proto
@@ -405,8 +405,9 @@ message GetUpdatesMessage {
   // delimited by a length prefix, which is encoded as a varint.
   optional bool streaming = 7 [default = false];
 
-  // Whether to request the syncable_bookmarks permanent item.
-  optional bool include_syncable_bookmarks = 1000 [default = false];
+  // Whether to create the mobile bookmarks folder if it's not
+  // already created.  Should be set to true only by mobile clients.
+  optional bool create_mobile_bookmarks_folder = 1000 [default = false];
 };
 
 message AuthenticateMessage {