[NOT FOR REVIEW] Working cpp enum example

ui/base/BUILD.gn

Index: ui/base/BUILD.gn
diff --git a/ui/base/BUILD.gn b/ui/base/BUILD.gn
index dbef91dd79441948d0d38407b87041ba2fba754a..40dd645ea9461a1e6eecee9478180f8f7210e3a1 100644
--- a/ui/base/BUILD.gn
+++ b/ui/base/BUILD.gn
@@ -697,8 +697,19 @@ if (is_android) {
       "../android/java/src/org/chromium/ui/base/ViewAndroid.java",
       "../android/java/src/org/chromium/ui/base/WindowAndroid.java",
     ]
+    deps = [
+      ":ui_base_touch_device_java_enums",
+    ]
     jni_package = "base"
   }
+  java_cpp_enum("ui_base_touch_device_java_enums") {
+    sources = [
+      "touch/touch_device.h",
+    ]
+    outputs = [
+      "org/chromium/ui/base/PointerType.java",
+    ]
+  }
 }
 
 # TODO(GYP): Make this work on Android and reenable it.