Revert of Inline sign in extracts gaia id from HTTP header and seeds account tracker

chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc

Index: chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc
diff --git a/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc b/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc
index d1ccfa6da360abe49b22f99ad8fca6bc6dbfd64c..ddc22157a8dedd7042ea3aab5dbb37da4716cbee 100644
--- a/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc
+++ b/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc
@@ -8,6 +8,7 @@
 #include <vector>
 
 #include "base/bind.h"
+#include "base/bind_helpers.h"
 #include "base/debug/trace_event.h"
 #include "base/location.h"
 #include "base/logging.h"
@@ -46,6 +47,7 @@
 #include "chrome/browser/io_thread.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/easy_unlock_service.h"
+#include "chrome/browser/ui/webui/chromeos/login/authenticated_user_email_retriever.h"
 #include "chrome/browser/ui/webui/chromeos/login/error_screen_handler.h"
 #include "chrome/browser/ui/webui/chromeos/login/l10n_util.h"
 #include "chrome/browser/ui/webui/chromeos/login/native_window_delegate.h"
@@ -71,6 +73,7 @@
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/web_contents.h"
 #include "google_apis/gaia/gaia_auth_util.h"
+#include "net/url_request/url_request_context_getter.h"
 #include "third_party/cros_system_api/dbus/service_constants.h"
 #include "ui/base/webui/web_ui_util.h"
 
@@ -774,6 +777,8 @@
               &SigninScreenHandler::HandleUpdateOfflineLogin);
   AddCallback("focusPod", &SigninScreenHandler::HandleFocusPod);
   AddCallback("hardlockPod", &SigninScreenHandler::HandleHardlockPod);
+  AddCallback("retrieveAuthenticatedUserEmail",
+              &SigninScreenHandler::HandleRetrieveAuthenticatedUserEmail);
   AddCallback("getPublicSessionKeyboardLayouts",
               &SigninScreenHandler::HandleGetPublicSessionKeyboardLayouts);
   AddCallback("cancelConsumerManagementEnrollment",
@@ -1380,6 +1385,17 @@
   service->SetHardlockState(EasyUnlockScreenlockStateHandler::USER_HARDLOCK);
 }
 
+void SigninScreenHandler::HandleRetrieveAuthenticatedUserEmail(
+    double attempt_token) {
+  // TODO(antrim) : move GaiaSigninScreen dependency to GaiaSigninScreen.
+  email_retriever_.reset(new AuthenticatedUserEmailRetriever(
+      base::Bind(&SigninScreenHandler::CallJS<double, std::string>,
+                 base::Unretained(this),
+                 "login.GaiaSigninScreen.setAuthenticatedUserEmail",
+                 attempt_token),
+      Profile::FromWebUI(web_ui())->GetRequestContext()));
+}
+
 void SigninScreenHandler::HandleGetPublicSessionKeyboardLayouts(
     const std::string& user_id,
     const std::string& locale) {