SkyShell should be able to draw a green square with GL

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") {
   deps = [
     ":sky_shell_apk",
   ]
 }
 
 generate_jni("jni_headers") {
   sources = [
     "apk/src/org/domokit/sky/shell/SkyMain.java",
+    "apk/src/org/domokit/sky/shell/SkyView.java",
   ]
   jni_package = "sky/shell"
 }
 
 shared_library("sky_shell") {
   sources = [
+    "gpu_driver.cc",
+    "gpu_driver.h",
     "library_loader.cc",
+    "shell.cc",
+    "shell.h",
     "sky_main.cc",
     "sky_main.h",
+    "sky_view.cc",
+    "sky_view.h",
   ]
 
+  configs += [ "//third_party/khronos:khronos_headers" ]
+
   deps = [
     "//base",
     "//build/config/sanitizers:deps",
     "//ui/gl",
     ":jni_headers",
   ]
 }
 
 android_library("java") {
   java_files = [
     "apk/src/org/domokit/sky/shell/SkyMain.java",
     "apk/src/org/domokit/sky/shell/SkyShellActivity.java",
     "apk/src/org/domokit/sky/shell/SkyShellApplication.java",
+    "apk/src/org/domokit/sky/shell/SkyView.java",
   ]
 
   deps = [
     "//base:base_java",
   ]
 }
 
 android_resources("resources") {
   resource_dirs = [ "apk/res" ]
   custom_package = "org.domokit.sky.shell"
 }
 
 android_apk("sky_shell_apk") {
   apk_name = "SkyShell"
 
   android_manifest = "apk/AndroidManifest.xml"
   native_libs = [ "libsky_shell.so" ]
 
   asset_location = "apk/res"
 
   deps = [
     ":sky_shell",
     ":java",
     ":resources",
     "//base:base_java",
   ]
 }