Let Ubertoken Fetch be primed with an access token.

components/signin/core/browser/gaia_cookie_manager_service.cc

Index: components/signin/core/browser/gaia_cookie_manager_service.cc
diff --git a/components/signin/core/browser/gaia_cookie_manager_service.cc b/components/signin/core/browser/gaia_cookie_manager_service.cc
index e8a0cb76802947ef5702a025e003df2f7c585d55..415d14baf4c8e003686194c5d617bc66b43d47e2 100644
--- a/components/signin/core/browser/gaia_cookie_manager_service.cc
+++ b/components/signin/core/browser/gaia_cookie_manager_service.cc
@@ -309,6 +309,11 @@ void GaiaCookieManagerService::Shutdown() {
 
 void GaiaCookieManagerService::AddAccountToCookie(
     const std::string& account_id) {
+  AddAccountToCookieWithToken(account_id, std::string());
+}
+
+void GaiaCookieManagerService::AddAccountToCookieWithToken(
+    const std::string& account_id, const std::string& oauth2_token) {
   if (!signin_client_->AreSigninCookiesAllowed()) {
     SignalComplete(account_id,
         GoogleServiceAuthError(GoogleServiceAuthError::REQUEST_CANCELED));
@@ -318,8 +323,9 @@ void GaiaCookieManagerService::AddAccountToCookie(
   DCHECK(!account_id.empty());
   VLOG(1) << "GaiaCookieManagerService::AddAccountToCookie: " << account_id;
   requests_.push_back(GaiaCookieRequest::CreateAddAccountRequest(account_id));
-  if (requests_.size() == 1)
-    StartFetchingUbertoken();
+  if (requests_.size() == 1) {
+    StartFetchingUbertoken(oauth2_token);
+  }
 }
 
 bool GaiaCookieManagerService::ListAccounts(
@@ -566,13 +572,17 @@ void GaiaCookieManagerService::OnListAccountsFailure(
   HandleNextRequest();
 }
 
-void GaiaCookieManagerService::StartFetchingUbertoken() {
+void GaiaCookieManagerService::StartFetchingUbertoken(
+    const std::string& access_token) {
   VLOG(1) << "GaiaCookieManagerService::StartFetching account_id="
           << requests_.front().account_id();
   uber_token_fetcher_.reset(
       new UbertokenFetcher(token_service_, this, source_,
                            signin_client_->GetURLRequestContext()));
-  uber_token_fetcher_->StartFetchingToken(requests_.front().account_id());
+  if (access_token.empty())
+    uber_token_fetcher_->StartFetchingToken(requests_.front().account_id());
+  else
+    uber_token_fetcher_->OnGetTokenSuccess(nullptr, access_token, base::Time());
 }
 
 void GaiaCookieManagerService::StartFetchingMergeSession() {
@@ -635,7 +645,7 @@ void GaiaCookieManagerService::HandleNextRequest() {
   } else {
     switch (requests_.front().request_type()) {
       case GaiaCookieRequestType::ADD_ACCOUNT:
-        StartFetchingUbertoken();
+        StartFetchingUbertoken(std::string());
         break;
       case GaiaCookieRequestType::LOG_OUT:
         StartLogOutUrlFetch();