Cleanup file includes of CupsPrintersHandler in favor of forward declarations

Bug: 1022622
Test: end to end manual
Change-Id: I4202b54fb2788308da01b649b0b8e77bc4b51cd9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1903819
Commit-Queue: jimmy gong <jimmyxgong@chromium.org>
Reviewed-by: Bailey Berro <baileyberro@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#714326}

chrome/browser/ui/webui/settings/chromeos/cups_printers_handler.cc

@@ -9,6 +9,7 @@
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/containers/flat_map.h"
+#include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/logging.h"
@@ -29,6 +30,7 @@
 #include "chrome/browser/chromeos/printing/printer_event_tracker_factory.h"
 #include "chrome/browser/chromeos/printing/printer_info.h"
 #include "chrome/browser/download/download_prefs.h"
+#include "chrome/browser/local_discovery/endpoint_resolver.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_window.h"

chrome/browser/ui/webui/settings/chromeos/cups_printers_handler.h

@@ -10,23 +10,25 @@
 #include <string>
 #include <vector>
 
-#include "base/files/file_path.h"
 #include "base/memory/weak_ptr.h"
 #include "base/scoped_observer.h"
 #include "chrome/browser/chromeos/printing/cups_printers_manager.h"
 #include "chrome/browser/chromeos/printing/printer_configurer.h"
 #include "chrome/browser/chromeos/printing/printer_event_tracker.h"
-#include "chrome/browser/local_discovery/endpoint_resolver.h"
 #include "chrome/browser/ui/webui/settings/settings_page_ui_handler.h"
-#include "chromeos/printing/ppd_provider.h"
 #include "chromeos/printing/printer_configuration.h"
 #include "printing/printer_query_result_chromeos.h"
 #include "ui/shell_dialogs/select_file_dialog.h"
 
 namespace base {
+class FilePath;
 class ListValue;
 }  // namespace base
 
+namespace local_discovery {
+class EndpointResolver;
+}  // namespace local_discovery
+
 class Profile;
 
 namespace chromeos {