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 8ec8c8c9fd268addc6034b5ae8eb4a3e7d133b5f..7c86dd6bcfc86a2e302c9d9bc4ee71c9accd1f4b 100644
--- a/content/public/browser/content_browser_client.cc
+++ b/content/public/browser/content_browser_client.cc
@@ -226,11 +226,12 @@ 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() {