mandoline: Add back/forward support and UI.

components/web_view/BUILD.gn

 # Copyright 2015 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("//mojo/public/mojo_application.gni")
 
 source_set("switches") {
   sources = [
     "web_view_switches.cc",
     "web_view_switches.h",
   ]
 }
 
 source_set("lib") {
   sources = [
     "frame.cc",
     "frame.h",
     "frame_connection.cc",
     "frame_connection.h",
     "frame_devtools_agent.cc",
     "frame_devtools_agent.h",
     "frame_devtools_agent_delegate.h",
     "frame_tree.cc",
     "frame_tree.h",
     "frame_tree_delegate.h",
     "frame_user_data.h",
+    "navigation_entry.cc",
+    "navigation_entry.h",
     "pending_web_view_load.cc",
     "pending_web_view_load.h",
     "web_view_application_delegate.cc",
     "web_view_application_delegate.h",
     "web_view_impl.cc",
     "web_view_impl.h",
   ]
 
   deps = [
     ":switches",
@@ skipping 61 matching lines @@
     "//components/view_manager/public/interfaces",
     "//components/web_view/public/interfaces",
     "//mojo/application/public/cpp:sources",
     "//mojo/application/public/cpp:test_support",
     "//ui/mojo/geometry:interfaces",
     "//ui/mojo/geometry:util",
   ]
 
   data_deps = [ "//components/view_manager" ]
 }