1 files changed, 5 insertions, 0 deletions
diff --git a/gpu/command_buffer/common/mailbox.h b/gpu/command_buffer/common/mailbox.h
index d0e4c2c..938167f 100644
--- a/gpu/command_buffer/common/mailbox.h
+++ b/gpu/command_buffer/common/mailbox.h
@@ -5,6 +5,8 @@
 #ifndef GPU_COMMAND_BUFFER_MAILBOX_H_
 #define GPU_COMMAND_BUFFER_MAILBOX_H_
 
+#include <string.h>
+
 #include "gpu/command_buffer/common/types.h"
 #include "gpu/gpu_export.h"
 
@@ -16,6 +18,9 @@ struct GPU_EXPORT Mailbox {
   void SetZero();
   void SetName(const int8* name);
   int8 name[64];
+  bool operator<(const Mailbox& other) const {
+    return memcmp(this, &other, sizeof other) < 0;
+  }
 };
 
 }  // namespace gpu