Introduce ViewRoot forwarding input/view events to native

ui/android/ui_android_jni_registrar.cc

Index: ui/android/ui_android_jni_registrar.cc
diff --git a/ui/android/ui_android_jni_registrar.cc b/ui/android/ui_android_jni_registrar.cc
index 3c02c501c0b05ab367ee1ea4750ef5006e153bd2..1534cd566a96875e74704583dc45f5e534d00c98 100644
--- a/ui/android/ui_android_jni_registrar.cc
+++ b/ui/android/ui_android_jni_registrar.cc
@@ -10,6 +10,7 @@
 #include "ui/android/resources/resource_manager_impl.h"
 #include "ui/android/screen_android.h"
 #include "ui/android/view_android.h"
+#include "ui/android/view_root.h"
 #include "ui/android/window_android.h"
 
 namespace ui {
@@ -17,6 +18,7 @@ namespace ui {
 static base::android::RegistrationMethod kAndroidRegisteredMethods[] = {
     {"DisplayAndroidManager", ui::RegisterScreenAndroid},
     {"ResourceManager", ui::ResourceManagerImpl::RegisterResourceManager},
+    {"ViewRoot", ui::RegisterViewRoot},
     {"WindowAndroid", WindowAndroid::RegisterWindowAndroid},
 };