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

mojo/runner/android/library_loader.cc

Index: mojo/runner/android/library_loader.cc
diff --git a/mojo/runner/android/library_loader.cc b/mojo/runner/android/library_loader.cc
index 8eb0f04270bb4fd1f433b383e38d6613a55bce00..7ed3497ed0ad628a67339b55a77f611cc90ea431 100644
--- a/mojo/runner/android/library_loader.cc
+++ b/mojo/runner/android/library_loader.cc
@@ -7,15 +7,16 @@
 #include "base/android/jni_android.h"
 #include "base/android/jni_registrar.h"
 #include "base/bind.h"
+#include "components/view_manager/native_viewport/platform_viewport_android.h"
 #include "mojo/runner/android/android_handler.h"
 #include "mojo/runner/android/main.h"
-#include "ui/platform_window/android/platform_window_android.h"
 
 namespace {
 
 base::android::RegistrationMethod kMojoRegisteredMethods[] = {
     {"AndroidHandler", mojo::runner::RegisterAndroidHandlerJni},
-    {"PlatformWindowAndroid", ui::PlatformWindowAndroid::Register},
+    {"PlatformViewportAndroid",
+     native_viewport::PlatformViewportAndroid::Register},
     {"ShellMain", mojo::runner::RegisterShellMain},
 };