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

components/view_manager/BUILD.gn

Index: components/view_manager/BUILD.gn
diff --git a/components/view_manager/BUILD.gn b/components/view_manager/BUILD.gn
index d85079929e357e259b305b6c4e660519bfd21a94..e91eec3e5c98e3953a8e65220f0b55a544bdc1fc 100644
--- a/components/view_manager/BUILD.gn
+++ b/components/view_manager/BUILD.gn
@@ -12,10 +12,28 @@
 
   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") {