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-rw-r--r--chromium/base/macros.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/chromium/base/macros.h b/chromium/base/macros.h
index c67bdbd9870..0962f39129a 100644
--- a/chromium/base/macros.h
+++ b/chromium/base/macros.h
@@ -33,6 +33,10 @@
TypeName() = delete; \
DISALLOW_COPY_AND_ASSIGN(TypeName)
+// Workaround for MSVC, which expands __VA_ARGS__ as one macro argument. To
+// work around this bug, wrap the entire expression in this macro...
+#define CR_EXPAND_ARG(arg) arg
+
// Used to explicitly mark the return value of a function as unused. If you are
// really sure you don't want to do anything with the return value of a function
// that has been marked WARN_UNUSED_RESULT, wrap it with this. Example: