[Sync] Add cookie jar mismatch logging

sync/sessions/sync_session_context.h

Index: sync/sessions/sync_session_context.h
diff --git a/sync/sessions/sync_session_context.h b/sync/sessions/sync_session_context.h
index 194ce4632fec3d8aa761aa0ac4f5373b0689f7f9..5c61832d41072df5e45840d9c7d5a1db3d3e6231 100644
--- a/sync/sessions/sync_session_context.h
+++ b/sync/sessions/sync_session_context.h
@@ -126,6 +126,14 @@ class SYNC_EXPORT SyncSessionContext {
     return model_type_registry_;
   }
 
+  bool cookie_jar_mismatch() const {
+    return cookie_jar_mismatch_;
+  }
+
+  void set_cookie_jar_mismatch(bool cookie_jar_mismatch) {
+    cookie_jar_mismatch_ = cookie_jar_mismatch;
+  }
+
  private:
   // Rather than force clients to set and null-out various context members, we
   // extend our encapsulation boundary to scoped helpers that take care of this
@@ -180,6 +188,11 @@ class SYNC_EXPORT SyncSessionContext {
   // enable the pre-commit update avoidance experiment described above.
   const bool client_enabled_pre_commit_update_avoidance_;
 
+   // Whether the account(s) present in the content area's cookie jar match the
+   // chrome account. If multiple accounts are present in the cookie jar, a
+   // mismatch implies all of them are different from the chrome account.
+  bool cookie_jar_mismatch_;
+
   DISALLOW_COPY_AND_ASSIGN(SyncSessionContext);
 };