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

ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc

 // Copyright (c) 2012 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/views/widget/desktop_aura/desktop_window_tree_host_x11.h"
 
 #include <X11/extensions/shape.h>
 #include <X11/extensions/XInput2.h>
 #include <X11/Xatom.h>
 #include <X11/Xregion.h>
@@ skipping 744 matching lines @@
 }
 
 void DesktopWindowTreeHostX11::Hide() {
   if (window_mapped_) {
     XWithdrawWindow(xdisplay_, xwindow_, 0);
     window_mapped_ = false;
   }
   native_widget_delegate_->OnNativeWidgetVisibilityChanged(false);
 }
 
-void DesktopWindowTreeHostX11::ToggleFullScreen() {
-  NOTIMPLEMENTED();
-}
-
 gfx::Rect DesktopWindowTreeHostX11::GetBounds() const {
   return bounds_;
 }
 
 void DesktopWindowTreeHostX11::SetBounds(const gfx::Rect& bounds) {
   bool origin_changed = bounds_.origin() != bounds.origin();
   bool size_changed = bounds_.size() != bounds.size();
   XWindowChanges changes = {0};
   unsigned value_mask = 0;
 
@@ skipping 23 matching lines @@
   bounds_ = bounds;
 
   if (origin_changed)
     native_widget_delegate_->AsWidget()->OnNativeWidgetMove();
   if (size_changed)
     OnHostResized(bounds.size());
   else
     compositor()->ScheduleRedrawRect(gfx::Rect(bounds.size()));
 }
 
-gfx::Insets DesktopWindowTreeHostX11::GetInsets() const {
-  return gfx::Insets();
-}
-
-void DesktopWindowTreeHostX11::SetInsets(const gfx::Insets& insets) {
-}
-
 gfx::Point DesktopWindowTreeHostX11::GetLocationOnNativeScreen() const {
   return bounds_.origin();
 }
 
 void DesktopWindowTreeHostX11::SetCapture() {
   // This is vaguely based on the old NativeWidgetGtk implementation.
   //
   // X11's XPointerGrab() shouldn't be used for everything; it doesn't map
   // cleanly to Windows' SetCapture(). GTK only provides a separate concept of
   // a grab that wasn't the X11 pointer grab, but was instead a manual
@@ skipping 31 matching lines @@
                 &root_x_return, &root_y_return,
                 &win_x_return, &win_y_return,
                 &mask_return);
   *location_return = gfx::Point(
       std::max(0, std::min(bounds_.width(), win_x_return)),
       std::max(0, std::min(bounds_.height(), win_y_return)));
   return (win_x_return >= 0 && win_x_return < bounds_.width() &&
           win_y_return >= 0 && win_y_return < bounds_.height());
 }
 
-bool DesktopWindowTreeHostX11::ConfineCursorToRootWindow() {
-  NOTIMPLEMENTED();
-  return false;
-}
-
-void DesktopWindowTreeHostX11::UnConfineCursor() {
-  NOTIMPLEMENTED();
-}
-
 void DesktopWindowTreeHostX11::SetCursorNative(gfx::NativeCursor cursor) {
   XDefineCursor(xdisplay_, xwindow_, cursor.platform());
 }
 
 void DesktopWindowTreeHostX11::MoveCursorToNative(const gfx::Point& location) {
   XWarpPointer(xdisplay_, None, x_root_window_, 0, 0, 0, 0,
                bounds_.x() + location.x(), bounds_.y() + location.y());
 }
 
 void DesktopWindowTreeHostX11::OnCursorVisibilityChangedNative(bool show) {
@@ skipping 744 matching lines @@
   if (linux_ui) {
     ui::NativeTheme* native_theme = linux_ui->GetNativeTheme();
     if (native_theme)
       return native_theme;
   }
 
   return ui::NativeTheme::instance();
 }
 
 }  // namespace views