Extensions: Replace PO2TS::GetPrimaryAccountId() with SMB::GetAuthenticatedAccountId.

chrome/browser/extensions/api/identity/gaia_web_auth_flow.cc

Index: chrome/browser/extensions/api/identity/gaia_web_auth_flow.cc
diff --git a/chrome/browser/extensions/api/identity/gaia_web_auth_flow.cc b/chrome/browser/extensions/api/identity/gaia_web_auth_flow.cc
index 2c63a19a53caea5a82f76fbf91ce771dd3f6f46d..36c78b43df17b118e8c2f47ded7ea00a974c21d6 100644
--- a/chrome/browser/extensions/api/identity/gaia_web_auth_flow.cc
+++ b/chrome/browser/extensions/api/identity/gaia_web_auth_flow.cc
@@ -11,6 +11,8 @@
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/profile_oauth2_token_service.h"
 #include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
+#include "chrome/browser/signin/signin_manager.h"
+#include "chrome/browser/signin/signin_manager_factory.h"
 #include "google_apis/gaia/gaia_urls.h"
 #include "net/base/escape.h"
 
@@ -62,7 +64,10 @@ void GaiaWebAuthFlow::Start() {
   ubertoken_fetcher_.reset(new UbertokenFetcher(token_service,
                                                 this,
                                                 profile_->GetRequestContext()));
-  ubertoken_fetcher_->StartFetchingToken(token_service->GetPrimaryAccountId());
+  SigninManagerBase* signin_manager =
+      SigninManagerFactory::GetForProfile(profile_);
+  ubertoken_fetcher_->StartFetchingToken(
+      signin_manager->GetAuthenticatedAccountId());
 }
 
 void GaiaWebAuthFlow::OnUbertokenSuccess(const std::string& token) {