Introduce ViewRoot forwarding input/view events to native

ui/android/display_android_manager.cc

Index: ui/android/display_android_manager.cc
diff --git a/ui/android/display_android_manager.cc b/ui/android/display_android_manager.cc
index 5e467c6877ae9cb6aa2f4e523739d5a2cfc9bb42..f711be439a80b77a8fd4619bb6bcaa7dee8f9d17 100644
--- a/ui/android/display_android_manager.cc
+++ b/ui/android/display_android_manager.cc
@@ -11,6 +11,7 @@
 #include "base/stl_util.h"
 #include "jni/DisplayAndroidManager_jni.h"
 #include "ui/android/screen_android.h"
+#include "ui/android/view_android.h"
 #include "ui/android/window_android.h"
 #include "ui/display/display.h"
 
@@ -44,6 +45,11 @@ DisplayAndroidManager::~DisplayAndroidManager() {}
 Display DisplayAndroidManager::GetDisplayNearestWindow(
     gfx::NativeView view) const {
   ui::WindowAndroid* window = view ? view->GetWindowAndroid() : nullptr;
+  return GetDisplayNearestWindowAndroid(window);
+}
+
+Display DisplayAndroidManager::GetDisplayNearestWindowAndroid(
+      gfx::NativeWindow window) const {
   if (window) {
     DisplayList::Displays::const_iterator it =
         display_list().FindDisplayById(window->display_id());