Add the Mojo implementation of authenticator.mojom's MakeCredential.

third_party/WebKit/Source/modules/webauth/WebAuthentication.h

Index: third_party/WebKit/Source/modules/webauth/WebAuthentication.h
diff --git a/third_party/WebKit/Source/modules/webauth/WebAuthentication.h b/third_party/WebKit/Source/modules/webauth/WebAuthentication.h
index 152d1692dace0e1155b4714bc2a0cd76053fe945..3fc18381d9613261b718944c608d320a10534c2c 100644
--- a/third_party/WebKit/Source/modules/webauth/WebAuthentication.h
+++ b/third_party/WebKit/Source/modules/webauth/WebAuthentication.h
@@ -29,6 +29,7 @@ class WebAuthentication final
       public ContextLifecycleObserver {
   DEFINE_WRAPPERTYPEINFO();
   USING_GARBAGE_COLLECTED_MIXIN(WebAuthentication);
+  USING_PRE_FINALIZER(WebAuthentication, Dispose);
 
  public:
   static WebAuthentication* Create(LocalFrame& frame) {
@@ -45,28 +46,34 @@ class WebAuthentication final
                                const HeapVector<ScopedCredentialParameters>,
                                const BufferSource&,
                                ScopedCredentialOptions&);
+  /* ScriptPromise makeCredential(ScriptState*,
+                               const RelyingPartyAccount&,
+                               const HeapVector<ScopedCredentialParameters>,
+                               const BufferSource&); */
   ScriptPromise getAssertion(ScriptState*,
                              const BufferSource&,
                              const AuthenticationAssertionOptions&);
 
-  // ContextLifecycleObserver overrides.
-  void contextDestroyed(ExecutionContext*) override;
-
   webauth::mojom::blink::Authenticator* authenticator() const {
     return m_authenticator.get();
   }
 
-  void onMakeCredential(ScriptPromiseResolver*,
-                        Vector<webauth::mojom::blink::ScopedCredentialInfoPtr>);
-  bool markRequestComplete(ScriptPromiseResolver*);
-
-  void onAuthenticatorConnectionError();
+  // ContextLifecycleObserver overrides.
+  void ContextDestroyed(ExecutionContext*) override;
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   explicit WebAuthentication(LocalFrame&);
 
+  void onMakeCredential(ScriptPromiseResolver*,
+                        webauth::mojom::blink::AuthenticatorStatus,
+                        webauth::mojom::blink::ScopedCredentialInfoPtr);
+  ScriptPromise rejectIfNotSupported(ScriptState*);
+  void onAuthenticatorConnectionError();
+  bool markRequestComplete(ScriptPromiseResolver*);
+  void cleanup();
+
   webauth::mojom::blink::AuthenticatorPtr m_authenticator;
   HeapHashSet<Member<ScriptPromiseResolver>> m_authenticatorRequests;
 };