Made sync code build and pass unit tests on OS X.

chrome/test/sync/engine/mock_server_connection.cc

Index: chrome/test/sync/engine/mock_server_connection.cc
diff --git a/chrome/test/sync/engine/mock_server_connection.cc b/chrome/test/sync/engine/mock_server_connection.cc
index 372d40844798902e4e793bb56086ee0a767cf5b2..b2af891b73a30d4ef42dd959493e76f73744a5df 100644
--- a/chrome/test/sync/engine/mock_server_connection.cc
+++ b/chrome/test/sync/engine/mock_server_connection.cc
@@ -43,9 +43,9 @@ MockConnectionManager::MockConnectionManager(DirectoryManager* dirmgr,
       directory_name_(name),
       mid_commit_callback_function_(NULL),
       mid_commit_observer_(NULL),
-      client_command_(NULL),
       throttling_(false),
       fail_non_periodic_get_updates_(false),
+      client_command_(NULL),
       next_position_in_parent_(2) {
     server_reachable_ = true;
 };
@@ -405,4 +405,5 @@ void MockConnectionManager::ThrottleNextRequest(
   throttling_ = true;
   if (visitor)
     visitor->VisitAtomically();
-}
+}
+