Introduce AndroidFocusRules and NativeWidgetAndroid

ui/views/widget/android/android_focus_rules.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef TouchHitRegion_h
-#define TouchHitRegion_h
+#include "ui/views/widget/android/android_focus_rules.h"
 
-#include "modules/canvas2d/EventHitRegion.h"
-#include "wtf/Allocator.h"
+#include "ui/aura/window.h"
 
-namespace blink {
+namespace views {
 
-class Touch;
+AndroidFocusRules::AndroidFocusRules() {}
 
-class TouchHitRegion : public EventHitRegion {
-    STATIC_ONLY(TouchHitRegion);
-public:
-    static String region(Touch&);
-};
+AndroidFocusRules::~AndroidFocusRules() {}
 
-} // namespace blink
+bool AndroidFocusRules::SupportsChildActivation(aura::Window* window) const {
+  return window->IsRootWindow();
+}
 
-#endif
+}  // namespace views