bluetooth: Add a WebBluetooth command line flag.

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 78774548b8568a2a058eb8717d52d16290e180ba..75fe5a7ead4a7f1beb6c854f4ab90c357153fc71 100644
--- a/chrome/browser/ui/startup/bad_flags_prompt.cc
+++ b/chrome/browser/ui/startup/bad_flags_prompt.cc
@@ -84,6 +84,12 @@ void ShowBadFlagsPrompt(Browser* browser) {
     // if they are not.
     switches::kUnsafelyTreatInsecureOriginAsSecure,
 
+    // This flag enables Web Bluetooth. Since the UI for Web Bluetooth is
+    // not yet implemented, websites could take control over paired devices
+    // without the users knowledge, so we need to show a warning for when
+    // the flag is enabled.
+    switches::kEnableWebBluetooth,
+
     NULL
   };