MacViews: Provide CreateNativeWidget and a stub NativeThemeMac in NativeWidgetMac

ui/views/widget/native_widget_mac.mm

 // Copyright 2014 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/native_widget_mac.h"
 
 #include <Cocoa/Cocoa.h>
 
 #include "ui/gfx/font_list.h"
+#include "ui/native_theme/native_theme.h"
 
 namespace views {
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeWidgetMac, public:
 
 NativeWidgetMac::NativeWidgetMac(internal::NativeWidgetDelegate* delegate)
     : delegate_(delegate), window_(nil) {
 }
 
@@ skipping 320 matching lines @@
 
 void NativeWidgetMac::EndMoveLoop() {
   NOTIMPLEMENTED();
 }
 
 void NativeWidgetMac::SetVisibilityChangedAnimationsEnabled(bool value) {
   NOTIMPLEMENTED();
 }
 
 ui::NativeTheme* NativeWidgetMac::GetNativeTheme() const {
-  NOTIMPLEMENTED();
-  return NULL;
+  return ui::NativeTheme::instance();
 }
 
 void NativeWidgetMac::OnRootViewLayout() const {
   NOTIMPLEMENTED();
 }
 
 void NativeWidgetMac::RepostNativeEvent(gfx::NativeEvent native_event) {
   NOTIMPLEMENTED();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // Widget, public:
 
 bool Widget::ConvertRect(const Widget* source,
                          const Widget* target,
                          gfx::Rect* rect) {
   return false;
 }
 
 namespace internal {
 
 ////////////////////////////////////////////////////////////////////////////////
 // internal::NativeWidgetPrivate, public:
 
 // static
 NativeWidgetPrivate* NativeWidgetPrivate::CreateNativeWidget(
     internal::NativeWidgetDelegate* delegate) {
-  NOTIMPLEMENTED();
-  return NULL;
+  return new NativeWidgetMac(delegate);
 }
 
 // static
 NativeWidgetPrivate* NativeWidgetPrivate::GetNativeWidgetForNativeView(
     gfx::NativeView native_view) {
   NOTIMPLEMENTED();
   return NULL;
 }
 
 // static
@@ skipping 41 matching lines @@
 }
 
 // static
 gfx::FontList NativeWidgetPrivate::GetWindowTitleFontList() {
   NOTIMPLEMENTED();
   return gfx::FontList();
 }
 
 }  // namespace internal
 }  // namespace views