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 69ab6588fd0c2e24c5d14eea4ca94f74e258a163..79a9f3bbb087a846a18cc0bb45ac1dd785987d36 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::kUnsafetyTreatInsecureOriginAsSecure,
 
+    // 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
   };