Make the call to Fido2ApiHandlerInternal.getAssertion.

Removes the NOT_IMPLEMENTED placeholder.

Bug: 678885
Change-Id: I4572dc2e6aad8019b383b93173b7962cc97ad60d
Reviewed-on: https://chromium-review.googlesource.com/1109498
Commit-Queue: Kim Paulhamus <kpaulhamus@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Reviewed-by: Wei-Yin Chen (陳威尹) <wychen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#569734}

chrome/android/java/src/org/chromium/chrome/browser/webauth/AuthenticatorImpl.java

@@ -60,7 +60,7 @@ public class AuthenticatorImpl implements Authenticator, HandlerResponseCallback
         }
 
         mIsOperationPending = true;
-        onError(AuthenticatorStatus.NOT_IMPLEMENTED);
+        Fido2ApiHandler.getInstance().getAssertion(options, mRenderFrameHost, this);
     }
 
     @Override
@@ -88,7 +88,8 @@ public class AuthenticatorImpl implements Authenticator, HandlerResponseCallback
 
     @Override
     public void onError(Integer status) {
-        assert(mMakeCredentialCallback != null || mGetAssertionCallback != null);
+        assert((mMakeCredentialCallback != null && mGetAssertionCallback == null)
+                || (mMakeCredentialCallback == null && mGetAssertionCallback != null));
         if (mMakeCredentialCallback != null) {
             mMakeCredentialCallback.call(status, null);
         } else if (mGetAssertionCallback != null) {