Refactor CryptAuth component to be more testable.

chrome/browser/signin/easy_unlock_service_regular.cc

Index: chrome/browser/signin/easy_unlock_service_regular.cc
diff --git a/chrome/browser/signin/easy_unlock_service_regular.cc b/chrome/browser/signin/easy_unlock_service_regular.cc
index 80fe3c2cdd4abe88bb8657216b411c5e73befc45..a578a6a593b09dd745d2e76c04670c890406f277 100644
--- a/chrome/browser/signin/easy_unlock_service_regular.cc
+++ b/chrome/browser/signin/easy_unlock_service_regular.cc
@@ -22,7 +22,7 @@
 #include "chrome/common/pref_names.h"
 #include "chromeos/login/user_names.h"
 #include "components/pref_registry/pref_registry_syncable.h"
-#include "components/proximity_auth/cryptauth/cryptauth_account_token_fetcher.h"
+#include "components/proximity_auth/cryptauth/cryptauth_access_token_fetcher.h"
 #include "components/proximity_auth/cryptauth/cryptauth_client.h"
 #include "components/proximity_auth/cryptauth/cryptauth_client_factory.h"
 #include "components/proximity_auth/switches.h"
@@ -223,12 +223,12 @@ void EasyUnlockServiceRegular::RunTurnOffFlow() {
 
   SetTurnOffFlowStatus(PENDING);
 
-  proximity_auth::CryptAuthClientFactory factory(
+  auto factory = proximity_auth::CryptAuthClientFactory::CreateDefault(
       ProfileOAuth2TokenServiceFactory::GetForProfile(profile()),
       SigninManagerFactory::GetForProfile(profile())
           ->GetAuthenticatedAccountId(),
       profile()->GetRequestContext(), GetDeviceClassifier());
-  cryptauth_client_ = factory.CreateInstance();
+  cryptauth_client_ = factory->CreateInstance();
 
   cryptauth::ToggleEasyUnlockRequest request;
   request.set_enable(false);