Remove unneeded stringprintf.h usage in chrome/ and net/

chrome/browser/extensions/extension_prefs_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/extension_prefs_unittest.h"
 
 #include "base/files/scoped_temp_dir.h"
 #include "base/path_service.h"
 #include "base/run_loop.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
-#include "base/strings/stringprintf.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "chrome/common/chrome_paths.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "components/prefs/mock_pref_change_callback.h"
 #include "components/prefs/pref_change_registrar.h"
 #include "components/prefs/scoped_user_pref_update.h"
 #include "components/sync/model/string_ordinal.h"
 #include "components/sync_preferences/pref_service_syncable.h"
 #include "content/public/browser/notification_details.h"
@@ skipping 969 matching lines @@
 
  private:
   std::unique_ptr<const PermissionSet> active_perms_;
   scoped_refptr<Extension> component_extension_;
   scoped_refptr<Extension> no_component_extension_;
 };
 TEST_F(ExtensionPrefsComponentExtension, ExtensionPrefsComponentExtension) {
 }
 
 }  // namespace extensions