Enable WebAuthN on Android by default

Bug: 678885
Change-Id: If95f75082e1ad44be008540aa93b59ec1f687cf8
Reviewed-on: https://chromium-review.googlesource.com/1176736Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Commit-Queue: Kim Paulhamus <kpaulhamus@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583862}

content/public/common/content_features.cc

@@ -512,11 +512,7 @@ const base::Feature kWebContentsOcclusion {
 // https://w3c.github.io/webauthn
 const base::Feature kWebAuth {
   "WebAuthentication",
-#if defined(OS_ANDROID)
-      base::FEATURE_DISABLED_BY_DEFAULT
-#else
       base::FEATURE_ENABLED_BY_DEFAULT
-#endif
 };
 
 // Controls whether BLE authenticators can be used via the WebAuthentication