[s13n] Remove unused headers from profile_chooser_view.cc

This Cl removes unused headers, account_tracker_service_factory.h
and account_tracker_service.h.

Bug: 922783
Change-Id: Ibfc8379b0aa4d8ed2e49bf00bcaa9651121b051f
Reviewed-on: https://chromium-review.googlesource.com/c/1428507Reviewed-by: Thomas Tangl <tangltom@chromium.org>
Commit-Queue: Julie Jeongeun Kim <jkim@igalia.com>
Cr-Commit-Position: refs/heads/master@{#625173}

chrome/browser/ui/views/profiles/profile_chooser_view.cc

@@ -23,7 +23,6 @@
 #include "chrome/browser/profiles/profile_window.h"
 #include "chrome/browser/profiles/profiles_state.h"
 #include "chrome/browser/signin/account_consistency_mode_manager.h"
-#include "chrome/browser/signin/account_tracker_service_factory.h"
 #include "chrome/browser/signin/identity_manager_factory.h"
 #include "chrome/browser/signin/signin_error_controller_factory.h"
 #include "chrome/browser/signin/signin_ui_util.h"
@@ -56,7 +55,6 @@
 #include "chrome/grit/generated_resources.h"
 #include "chrome/grit/theme_resources.h"
 #include "components/prefs/pref_service.h"
-#include "components/signin/core/browser/account_tracker_service.h"
 #include "components/signin/core/browser/signin_error_controller.h"
 #include "components/signin/core/browser/signin_metrics.h"
 #include "components/signin/core/browser/signin_pref_names.h"