make NavigationGesture part of public content API and use it outside content

content/public/common/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("//build/config/chromecast_build.gni")
 import("//build/config/features.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//ppapi/features/features.gni")
 import("//third_party/webrtc/build/webrtc.gni")
@@ skipping 137 matching lines @@
     "media_metadata.cc",
     "media_metadata.h",
     "media_stream_request.cc",
     "media_stream_request.h",
     "menu_item.cc",
     "menu_item.h",
     "mhtml_generation_params.cc",
     "mhtml_generation_params.h",
     "mojo_channel_switches.cc",
     "mojo_channel_switches.h",
+    "navigation_gesture.h",
     "notification_resources.cc",
     "notification_resources.h",
     "origin_util.h",
     "page_state.cc",
     "page_state.h",
     "page_type.h",
     "page_zoom.h",
     "pepper_plugin_info.cc",
     "pepper_plugin_info.h",
     "persistent_notification_status.h",
@@ skipping 141 matching lines @@
   sources = [
     "window_container_type.mojom",
   ]
 }
 
 mojom("service_names") {
   sources = [
     "service_names.mojom",
   ]
 }