Add more GN deps to the build.

components/dom_distiller/webui/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.
+
+# GYP version: components/dom_distiller.gyp:dom_distiller_webui
+static_library("webui") {
+  sources = [
+    "dom_distiller_handler.cc",
+    "dom_distiller_handler.h",
+    "dom_distiller_ui.cc",
+    "dom_distiller_ui.h",
+  ]
+
+  deps = [
+    "//base",
+    "//components/dom_distiller/core",
+    "//components/dom_distiller/core/proto",
+    "//components/resources",
+    "//components/strings",
+    "//content/public/browser",
+    "//skia",
+    #'../sync/sync.gyp:sync',  TODO(GYP)
+  ]
+}