Show the 'unsupported flag' message for --{enable,disable}-blink-features.

chrome/browser/ui/startup/bad_flags_prompt.cc

Index: chrome/browser/ui/startup/bad_flags_prompt.cc
diff --git a/chrome/browser/ui/startup/bad_flags_prompt.cc b/chrome/browser/ui/startup/bad_flags_prompt.cc
index 4b594970f396c902004353f393e31a3fd483e758..211b42e937cacb8b1dda70e705f3867670c9b059 100644
--- a/chrome/browser/ui/startup/bad_flags_prompt.cc
+++ b/chrome/browser/ui/startup/bad_flags_prompt.cc
@@ -74,6 +74,12 @@ void ShowBadFlagsPrompt(Browser* browser) {
     // http://crbug.com/327295
     switches::kEnableSpeechDispatcher,
 #endif
+
+    // These flags control Blink feature state, which is not supported and is
+    // intended only for use by Chromium developers.
+    switches::kDisableBlinkFeatures,
+    switches::kEnableBlinkFeatures,
+
     NULL
   };