Introduce AndroidFocusRules and NativeWidgetAndroid

ui/wm/android/android_focus_rules.cc

Index: ui/wm/android/android_focus_rules.cc
diff --git a/ui/wm/android/android_focus_rules.cc b/ui/wm/android/android_focus_rules.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e6376e932e369789dd02373c57a94fc2070a92a1
--- /dev/null
+++ b/ui/wm/android/android_focus_rules.cc
@@ -0,0 +1,24 @@
+// Copyright (c) 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.
+
+#include "ui/wm/android/android_focus_rules.h"
+
+#include "ui/aura/window.h"
+
+namespace wm {
+
+AndroidFocusRules::AndroidFocusRules() {
+}
+
+AndroidFocusRules::~AndroidFocusRules() {
+}
+
+bool AndroidFocusRules::SupportsChildActivation(aura::Window* window) const {
+  if (window->IsRootWindow())
+    return true;
+  else
+    return false;

[sadrul, 2015/10/19 15:36:11]

return window->IsRootWindow();

[bshe, 2015/11/03 19:40:39]

Done.

+}
+
+}  // namespace wm