Index: ui/compositor/compositor.cc |
diff --git a/ui/compositor/compositor.cc b/ui/compositor/compositor.cc |
index 2993d8a6fd21dffc40465c2ed46af07f0fba6a30..39485682af8f8f0ea26cab1456b9caca8b33f274 100644 |
--- a/ui/compositor/compositor.cc |
+++ b/ui/compositor/compositor.cc |
@@ -80,6 +80,7 @@ ContextFactory* ContextFactory::GetInstance() { |
// static |
void ContextFactory::SetInstance(ContextFactory* instance) { |
+ DCHECK_NE(!!g_context_factory, !!instance); |
g_context_factory = instance; |
} |