Introdcue AshWindowTreeHost and move ash/chrome specific code in WTH to ash.

ui/aura/window_tree_host_ozone.cc

 // Copyright 2013 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/aura/window_tree_host_ozone.h"
 
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/base/cursor/ozone/cursor_factory_ozone.h"
 #include "ui/events/ozone/event_factory_ozone.h"
 #include "ui/gfx/ozone/surface_factory_ozone.h"
@@ skipping 34 matching lines @@
 }
 
 gfx::AcceleratedWidget WindowTreeHostOzone::GetAcceleratedWidget() {
   return widget_;
 }
 
 void WindowTreeHostOzone::Show() { NOTIMPLEMENTED(); }
 
 void WindowTreeHostOzone::Hide() { NOTIMPLEMENTED(); }
 
-void WindowTreeHostOzone::ToggleFullScreen() { NOTIMPLEMENTED(); }
-
 gfx::Rect WindowTreeHostOzone::GetBounds() const { return bounds_; }
 
 void WindowTreeHostOzone::SetBounds(const gfx::Rect& bounds) {
   NOTIMPLEMENTED();
 }
 
-gfx::Insets WindowTreeHostOzone::GetInsets() const { return gfx::Insets(); }
-
-void WindowTreeHostOzone::SetInsets(const gfx::Insets& insets) {
-  NOTIMPLEMENTED();
-}
-
 gfx::Point WindowTreeHostOzone::GetLocationOnNativeScreen() const {
   return bounds_.origin();
 }
 
 void WindowTreeHostOzone::SetCapture() { NOTIMPLEMENTED(); }
 
 void WindowTreeHostOzone::ReleaseCapture() { NOTIMPLEMENTED(); }
 
 bool WindowTreeHostOzone::QueryMouseLocation(gfx::Point* location_return) {
   NOTIMPLEMENTED();
   return false;
 }
 
-bool WindowTreeHostOzone::ConfineCursorToRootWindow() {
-  NOTIMPLEMENTED();
-  return false;
-}
-
-void WindowTreeHostOzone::UnConfineCursor() { NOTIMPLEMENTED(); }
-
 void WindowTreeHostOzone::PostNativeEvent(
     const base::NativeEvent& native_event) {
   NOTIMPLEMENTED();
 }
 
 void WindowTreeHostOzone::OnDeviceScaleFactorChanged(
     float device_scale_factor) {
   NOTIMPLEMENTED();
 }
 
@@ skipping 20 matching lines @@
   return new WindowTreeHostOzone(bounds);
 }
 
 // static
 gfx::Size WindowTreeHost::GetNativeScreenSize() {
   NOTIMPLEMENTED();
   return gfx::Size();
 }
 
 }  // namespace aura