Port touch-demo.sky to Dart and make it work in SkyShell

sky/shell/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.
 
 assert(is_android)
 
 import("//build/config/android/config.gni")
 import("//build/config/android/rules.gni")
 
 group("shell") {
@@ skipping 27 matching lines @@
     "platform_view.cc",
     "platform_view.h",
     "shell.cc",
     "shell.h",
     "sky_main.cc",
     "sky_main.h",
     "ui/animator.cc",
     "ui/animator.h",
     "ui/engine.cc",
     "ui/engine.h",
+    "ui/input_event_converter.cc",
+    "ui/input_event_converter.h",
     "ui/platform_impl.cc",
     "ui/platform_impl.h",
     "ui_delegate.cc",
     "ui_delegate.h",
   ]
 
   deps = [
     "//base",
     "//base:i18n",
     "//build/config/sanitizers:deps",
     "//mojo/android:libsystem_java",
     "//mojo/common",
     "//mojo/edk/system",
     "//mojo/public/cpp/application",
     "//mojo/public/interfaces/application",
     "//mojo/services/network/public/interfaces",
     "//skia",
     "//sky/engine",
+    "//sky/services/viewport",
     "//ui/gfx/geometry",
     "//ui/gl",
     ":jni_headers",
   ]
 }
 
 android_library("java") {
   java_files = [
     "apk/src/org/domokit/sky/shell/JavaServiceProvider.java",
     "apk/src/org/domokit/sky/shell/PlatformView.java",
     "apk/src/org/domokit/sky/shell/SkyMain.java",
     "apk/src/org/domokit/sky/shell/SkyShellActivity.java",
     "apk/src/org/domokit/sky/shell/SkyShellApplication.java",
   ]
 
   deps = [
     "//base:base_java",
     "//mojo/android:system_java",
     "//mojo/public/interfaces/application:application_java",
     "//mojo/public/java:bindings",
     "//mojo/public/java:system",
     "//mojo/services/network/public/interfaces:interfaces_java",
+    "//sky/services/viewport:viewport_java",
   ]
 }
 
 sky_shell_assets_dir = "$root_build_dir/sky_shell/assets"
 
 android_resources("resources") {
   resource_dirs = [ "apk/res" ]
   custom_package = "org.domokit.sky.shell"
 }
 
@@ skipping 17 matching lines @@
   asset_location = sky_shell_assets_dir
 
   deps = [
     "//base:base_java",
     ":assets",
     ":java",
     ":resources",
     ":sky_shell",
   ]
 }