Add a pref name for share targets, and store their manifest data.

chrome/test/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/common/features.gni")
@@ skipping 3344 matching lines @@
     "../browser/ui/website_settings/mock_permission_prompt.h",
     "../browser/ui/website_settings/mock_permission_prompt_factory.cc",
     "../browser/ui/website_settings/mock_permission_prompt_factory.h",
     "../browser/ui/website_settings/website_settings_unittest.cc",
     "../browser/ui/webui/browsing_history_handler_unittest.cc",
     "../browser/ui/webui/fileicon_source_unittest.cc",
     "../browser/ui/webui/local_state/local_state_ui_unittest.cc",
     "../browser/ui/webui/log_web_ui_url_unittest.cc",
     "../browser/update_client/chrome_update_query_params_delegate_unittest.cc",
     "../browser/webshare/share_service_impl_unittest.cc",
+    "../browser/webshare/share_target_pref_helper_unittest.cc",
     "../browser/win/chrome_elf_init_unittest.cc",
     "../browser/win/enumerate_modules_model_unittest.cc",
     "../common/chrome_content_client_unittest.cc",
     "../common/chrome_paths_unittest.cc",
     "../common/component_flash_hint_file_linux_unittest.cc",
     "../common/conflicts/module_watcher_win_unittest.cc",
     "../common/crash_keys_unittest.cc",
     "../common/ini_parser_unittest.cc",
     "../common/mac/cfbundle_blocker_unittest.mm",
     "../common/mac/mock_launchd.cc",
@@ skipping 1751 matching lines @@
 }
 
 if (is_win) {
   loadable_module("conflicts_dll") {
     testonly = true
     sources = [
       "conflicts/conflicts_dll.cc",
     ]
   }
 }