android: Introduce a ui::PlatformWindow implementation for android.

components/view_manager/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/config/ui.gni")
 import("//testing/test.gni")
 import("//mojo/public/mojo_application.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
 
   group("view_manager") {
     deps = [
-      ":jni_headers",
       ":lib",
       ":loader",
-      ":view_manager_java",
       "native_viewport",
     ]
   }
 
-  android_library("view_manager_java") {
-    java_files = [ "native_viewport/android/src/org/chromium/mojo/PlatformViewportAndroid.java" ]
-
-    deps = [
-      "//base:base_java",
-    ]
-  }
-
-  generate_jni("jni_headers") {
-    sources = [
-      "native_viewport/android/src/org/chromium/mojo/PlatformViewportAndroid.java",
-    ]
-
-    jni_package = "mojo"
-  }
-
   source_set("loader") {
     sources = [
       "android_loader.cc",
       "android_loader.h",
     ]
 
     deps = [
       "public/interfaces",
       "//third_party/mojo/src/mojo/public/cpp/bindings",
     ]
@@ skipping 173 matching lines @@
     "//base/test:test_config",
     "//components/view_manager/public/cpp",
     "//components/view_manager/public/interfaces",
     "//mojo/application/public/cpp:test_support",
     "//ui/mojo/geometry:interfaces",
     "//ui/mojo/geometry:util",
   ]
 
   data_deps = [ ":view_manager" ]
 }