[Sync] Add support for loading, updating and querying delete journals in

sync/syncable/mutable_entry.cc

Index: sync/syncable/mutable_entry.cc
diff --git a/sync/syncable/mutable_entry.cc b/sync/syncable/mutable_entry.cc
index 5090ad1a9116739a00d89ae6f6952ec9c765acaa..e7306b2db608313403ff4dc9b02c632f1a29e23b 100644
--- a/sync/syncable/mutable_entry.cc
+++ b/sync/syncable/mutable_entry.cc
@@ -273,9 +273,13 @@ bool MutableEntry::Put(ProtoField field,
 bool MutableEntry::Put(BitField field, bool value) {
   DCHECK(kernel_);
   write_transaction_->SaveOriginal(kernel_);
-  if (kernel_->ref(field) != value) {
+  bool old_value = kernel_->ref(field);
+  if (old_value != value) {
     kernel_->put(field, value);
     kernel_->mark_dirty(GetDirtyIndexHelper());
+
+    if (field == SERVER_IS_DEL)
+      dir()->UpdateDeleteJournals(write_transaction(), old_value, *kernel_);

[tim (not reviewing), 2012/12/13 23:41:30]

One thing is that as-written, we could not use UpdateDeleteJournals in the event
of a local delete - first because the SERVER_IS_DEL field won't be set, but
second we shouldn't read/write things in the "SERVER_" namespace unless we know
we're on the sync thread.

[haitaol1, 2012/12/14 19:22:38]

Comments added. 

On 2012/12/13 23:41:30, timsteele wrote:

   }
   return true;
 }