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-rw-r--r--base/observer_list_threadsafe.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/base/observer_list_threadsafe.h b/base/observer_list_threadsafe.h
index d0151f4..c0716dd 100644
--- a/base/observer_list_threadsafe.h
+++ b/base/observer_list_threadsafe.h
@@ -9,6 +9,7 @@
#include <algorithm>
#include "base/basictypes.h"
+#include "base/callback.h"
#include "base/logging.h"
#include "base/message_loop.h"
#include "base/observer_list.h"