aura: Unify WindowTreeHost for some platforms

ui/platform_window/android/platform_window_android.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.
 
 #include "ui/platform_window/android/platform_window_android.h"
 
 #include <android/input.h>
 #include <android/native_window_jni.h>
 
 #include "base/android/jni_android.h"
 #include "jni/PlatformWindowAndroid_jni.h"
 #include "ui/events/event.h"
 #include "ui/events/keycodes/keyboard_code_conversion_android.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/platform_window/platform_window_delegate.h"
 
 namespace ui {
 
+// static
+scoped_ptr<PlatformWindow> PlatformWindow::Create(
+    PlatformWindowDelegate* delegate,
+    const gfx::Rect& bounds) {
+  return new PlatformWindowAndroid(delegate);
+}
+
 namespace {
 
 ui::EventType MotionEventActionToEventType(jint action) {
   switch (action) {
     case AMOTION_EVENT_ACTION_DOWN:
     case AMOTION_EVENT_ACTION_POINTER_DOWN:
       return ui::ET_TOUCH_PRESSED;
     case AMOTION_EVENT_ACTION_UP:
     case AMOTION_EVENT_ACTION_POINTER_UP:
       return ui::ET_TOUCH_RELEASED;
@@ skipping 185 matching lines @@
 
 void PlatformWindowAndroid::ConfineCursorToBounds(const gfx::Rect& bounds) {
   NOTIMPLEMENTED();
 }
 
 PlatformImeController* PlatformWindowAndroid::GetPlatformImeController() {
   return &platform_ime_controller_;
 }
 
 }  // namespace ui