Add information about sync session and other useful data to about:sync.

chrome/browser/sync/sessions/session_state.h

Index: chrome/browser/sync/sessions/session_state.h
diff --git a/chrome/browser/sync/sessions/session_state.h b/chrome/browser/sync/sessions/session_state.h
index c0c5f39ada3f75936e00d36a5c9dafeab4de05b2..ec4142cd8c6617256472df4cbc8c522c4391d1ac 100644
--- a/chrome/browser/sync/sessions/session_state.h
+++ b/chrome/browser/sync/sessions/session_state.h
@@ -84,6 +84,9 @@ struct SyncerStatus {
   // Overwrites due to conflict resolution counters.
   int num_local_overwrites;
   int num_server_overwrites;
+
+  // True if the account is currently throttled.
+  bool throttled;

[akalin, 2011/05/13 22:01:42]

we already store this state (it's called is_silenced in SyncSessionSnapshot). 
Maybe rename that one?

[lipalani1, 2011/05/13 22:35:39]

Done.

 };
 
 // Counters for various errors that can occur repeatedly during a sync session.
@@ -127,7 +130,8 @@ struct SyncSessionSnapshot {
       int num_blocking_conflicting_updates,
       int num_conflicting_updates,
       bool did_commit_items,
-      const SyncSourceInfo& source);
+      const SyncSourceInfo& source,
+      size_t num_entries);
   ~SyncSessionSnapshot();
 
   // Caller takes ownership of the returned dictionary.
@@ -146,6 +150,7 @@ struct SyncSessionSnapshot {
   const int num_conflicting_updates;
   const bool did_commit_items;
   const SyncSourceInfo source;
+  const size_t num_entries;
 };
 
 // Tracks progress of conflicts and their resolution using conflict sets.