Fix missing data_store.pb.h error when building extensions GN target.

chrome/browser/extensions/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/features.gni")
 import("//build/config/ui.gni")
 
 assert(enable_extensions)
 
 gypi_values =
@@ skipping 26 matching lines @@
     "//chrome:resources",
     "//chrome:strings",
     "//chrome/app/resources:platform_locale_settings",
     "//chrome/app/theme:theme_resources",
     "//chrome/browser/devtools",
     "//chrome/common",
     "//chrome/common/extensions/api:api_registration",
     "//chrome/common/safe_browsing:proto",
     "//chrome/installer/util",
     "//components/copresence",
+    "//components/data_reduction_proxy/proto:data_reduction_proxy_proto",
     "//components/dom_distiller/core",
     "//components/onc",
     "//components/proximity_auth",
     "//components/strings",
     "//components/update_client",
     "//components/url_matcher",
     "//content/app/resources",
     "//content/public/common",
     "//crypto",
     "//device/bluetooth",
@@ skipping 149 matching lines @@
                     "//chrome")
   }
 
   if (is_chromeos && use_ozone) {
     sources -= [ "global_shortcut_listener_chromeos.cc" ]
   }
   if (!use_ozone) {
     sources -= [ "global_shortcut_listener_ozone.cc" ]
   }
 }