Support Chromium-branded builds and cleanup reference build usage.

chrome/test/test_switches.h

Index: chrome/test/test_switches.h
diff --git a/chrome/test/test_switches.h b/chrome/test/test_switches.h
index 3494605f5a8726ba1d8ff9bf48763a890595f451..8f6003c6f24127aabbce831f76268b561540979b 100644
--- a/chrome/test/test_switches.h
+++ b/chrome/test/test_switches.h
@@ -10,6 +10,7 @@ namespace switches {
 // All switches in alphabetical order. The switches should be documented
 // alongside the definition of their values in the .cc file.
 extern const char kExtraChromeFlags[];
+extern const char kEnableChromiumBranding[];
 extern const char kEnableErrorDialogs[];
 extern const char kPageCyclerIterations[];
 extern const char kTestingChannel[];