Add a kill switch for all of Web Bluetooth.

content/public/browser/content_browser_client.cc

Index: content/public/browser/content_browser_client.cc
diff --git a/content/public/browser/content_browser_client.cc b/content/public/browser/content_browser_client.cc
index bfce2171a0c6ccf513b4e088cd73dd4cd5c33b6c..b74452ac81549d87ec8c2e09f43730ecd51a27d6 100644
--- a/content/public/browser/content_browser_client.cc
+++ b/content/public/browser/content_browser_client.cc
@@ -217,11 +217,12 @@ bool ContentBrowserClient::AllowKeygen(const GURL& url,
   return true;
 }
 
-bool ContentBrowserClient::AllowWebBluetooth(
+ContentBrowserClient::AllowWebBluetoothResult
+ContentBrowserClient::AllowWebBluetooth(
     content::BrowserContext* browser_context,
     const url::Origin& requesting_origin,
     const url::Origin& embedding_origin) {
-  return true;
+  return AllowWebBluetoothResult::ALLOW;
 }
 
 QuotaPermissionContext* ContentBrowserClient::CreateQuotaPermissionContext() {