Add missing header files to GN files

third_party/WebKit/Source/modules/geolocation/BUILD.gn

 # Copyright 2016 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("//third_party/WebKit/Source/modules/modules.gni")
 
 blink_modules_sources("geolocation") {
   sources = [
     "Coordinates.cpp",
+    "Coordinates.h",
     "GeoNotifier.cpp",
     "GeoNotifier.h",
     "Geolocation.cpp",
+    "Geolocation.h",
     "GeolocationError.h",
     "GeolocationWatchers.cpp",
     "GeolocationWatchers.h",
     "Geoposition.h",
     "NavigatorGeolocation.cpp",
     "NavigatorGeolocation.h",
     "PositionCallback.h",
     "PositionError.h",
     "PositionErrorCallback.h",
   ]
   deps = [
     "//device/geolocation/public/interfaces:interfaces_blink",
   ]
 }