device/fido: Enable ChromeOS platform authenticator

Enable since it is approved.

      ChromeOS WebAuthn dialog shows up when doing MakeCredential

Bug: 1150679
Test: in chrome://flags, set the flag to "Default", verify that the
Change-Id: Iccb00a5831575ad09d5db45f7454c12cd366d458
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2551935
Commit-Queue: Yicheng Li <yichengli@chromium.org>
Reviewed-by: Martin Kreichgauer <martinkr@google.com>
Cr-Commit-Position: refs/heads/master@{#833168}

device/fido/cros/authenticator.cc

@@ -383,7 +383,7 @@ bool ChromeOSAuthenticator::IsUVPlatformAuthenticatorAvailableBlocking() {
       u2f::kU2FServiceName, dbus::ObjectPath(u2f::kU2FServicePath));
 
   if (!u2f_proxy) {
-    FIDO_LOG(ERROR) << "Couldn't get u2f proxy";
+    FIDO_LOG(DEBUG) << "Couldn't get u2f proxy";
     return false;
   }
 
@@ -396,7 +396,7 @@ bool ChromeOSAuthenticator::IsUVPlatformAuthenticatorAvailableBlocking() {
       u2f_proxy->CallMethodAndBlock(&method_call, kShortTimeoutMs);
 
   if (!dbus_response) {
-    FIDO_LOG(ERROR) << "IsUvpaa dbus call had no response or timed out";
+    FIDO_LOG(DEBUG) << "IsUvpaa dbus call had no response or timed out";
     return false;
   }
 

device/fido/features.cc

@@ -41,7 +41,7 @@ const base::Feature kWebAuthCableLowLatency{"WebAuthenticationCableLowLatency",
 #if BUILDFLAG(IS_ASH)
 const base::Feature kWebAuthCrosPlatformAuthenticator{
     "WebAuthenticationCrosPlatformAuthenticator",
-    base::FEATURE_DISABLED_BY_DEFAULT};
+    base::FEATURE_ENABLED_BY_DEFAULT};
 #endif  // BUILDFLAG(IS_ASH)
 
 extern const base::Feature kWebAuthAttestationBlockList{