[Sync] Rename csync namespace to syncer

sync/notifier/mock_invalidation_state_tracker.h

Index: sync/notifier/mock_invalidation_state_tracker.h
diff --git a/sync/notifier/mock_invalidation_state_tracker.h b/sync/notifier/mock_invalidation_state_tracker.h
index ac884f56aa548596b6c6fc38f5355f47cf2df84e..e6d992db4a1f9c5447e0c5a6e7c27ae35c5b709c 100644
--- a/sync/notifier/mock_invalidation_state_tracker.h
+++ b/sync/notifier/mock_invalidation_state_tracker.h
@@ -9,7 +9,7 @@
 #include "sync/notifier/invalidation_state_tracker.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
-namespace csync {
+namespace syncer {
 
 class MockInvalidationStateTracker
     : public InvalidationStateTracker,
@@ -24,6 +24,6 @@ class MockInvalidationStateTracker
   MOCK_METHOD1(SetInvalidationState, void(const std::string&));
 };
 
-}  // namespace csync
+}  // namespace syncer
 
 #endif  // SYNC_NOTIFIER_MOCK_INVALIDATION_STATE_TRACKER_H_