diff -Naur a/tools/generate_shim_headers/generate_shim_headers.py b/tools/generate_shim_headers/generate_shim_headers.py
--- a/tools/generate_shim_headers/generate_shim_headers.py	2019-11-08 15:51:50.351101594 -0800
+++ b/tools/generate_shim_headers/generate_shim_headers.py	2019-11-08 15:52:42.156097978 -0800
@@ -18,7 +18,7 @@
 
 
 SHIM_TEMPLATE = """
-#if defined(OFFICIAL_BUILD)
+#if defined(GOOGLE_CHROME_BUILD)
 #error shim headers must not be used in official builds!
 #endif
 """