Mus experiment in content shell on Android.

ui/platform_window/android/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("//build/config/android/rules.gni")
 import("//testing/test.gni")
 
 assert(is_android)
 
 component("android") {
   output_name = "android_window"
   sources = [
     "android_window_export.h",
     "platform_ime_controller_android.cc",
     "platform_ime_controller_android.h",
     "platform_window_android.cc",
     "platform_window_android.h",
   ]
 
   defines = [ "ANDROID_WINDOW_IMPLEMENTATION" ]
 
   deps = [
     ":jni_headers",
     ":platform_window_java",
     "//base",
+    "//gpu/ipc/common:gpu_surface_tracker",
+    "//gpu/ipc/common:surface_handle_type",
     "//skia",
     "//ui/events:events",
     "//ui/events:events_base",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/platform_window",
+    "//ui/surface",
   ]
 
   libs = [ "android" ]
 }
 
 generate_jni("jni_headers") {
   sources = [
     "java/src/org/chromium/ui/PlatformImeControllerAndroid.java",
     "java/src/org/chromium/ui/PlatformWindowAndroid.java",
   ]
   jni_package = "android_window"
 }
 
 android_library("platform_window_java") {
   java_files = [
     "java/src/org/chromium/ui/PlatformImeControllerAndroid.java",
     "java/src/org/chromium/ui/PlatformWindowAndroid.java",
   ]
   deps = [
     "//base:base_java",
   ]
 }