Add most missing blink files to .gn files

third_party/WebKit/public/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/buildflag_header.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//third_party/WebKit/public/public_features.gni")
 import("//third_party/WebKit/Source/config.gni")
 import("//third_party/WebKit/Source/core/core.gni")
 import("//tools/grit/grit_rule.gni")
@@ skipping 386 matching lines @@
     "platform/modules/push_messaging/WebPushPermissionStatus.h",
     "platform/modules/push_messaging/WebPushProvider.h",
     "platform/modules/push_messaging/WebPushSubscription.h",
     "platform/modules/push_messaging/WebPushSubscriptionOptions.h",
     "platform/modules/remoteplayback/WebRemotePlaybackAvailability.h",
     "platform/modules/remoteplayback/WebRemotePlaybackClient.h",
     "platform/modules/remoteplayback/WebRemotePlaybackState.h",
     "platform/modules/screen_orientation/WebLockOrientationCallback.h",
     "platform/modules/screen_orientation/WebLockOrientationError.h",
     "platform/modules/screen_orientation/WebScreenOrientationClient.h",
+    "platform/modules/screen_orientation/WebScreenOrientationEnumTraits.h",
     "platform/modules/screen_orientation/WebScreenOrientationLockType.h",
     "platform/modules/screen_orientation/WebScreenOrientationType.h",
     "platform/modules/serviceworker/WebNavigationPreloadState.h",
     "platform/modules/serviceworker/WebServiceWorker.h",
     "platform/modules/serviceworker/WebServiceWorkerCache.h",
     "platform/modules/serviceworker/WebServiceWorkerCacheError.h",
     "platform/modules/serviceworker/WebServiceWorkerCacheStorage.h",
     "platform/modules/serviceworker/WebServiceWorkerClientQueryOptions.h",
     "platform/modules/serviceworker/WebServiceWorkerClientType.h",
     "platform/modules/serviceworker/WebServiceWorkerClientsClaimCallbacks.h",
@@ skipping 382 matching lines @@
 source_set("shared_typemap_traits") {
   visibility = [ ":*" ]
   sources = [
     "web/ConsoleMessageStructTraits.cpp",
     "web/ConsoleMessageStructTraits.h",
   ]
   deps = [
     ":mojo_bindings_shared__generator",
   ]
 }