Changing Aura background for new temporary one.

ui/aura_shell/desktop_background_view.cc

 // Copyright (c) 2011 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_shell/desktop_background_view.h"
 
 #include "base/utf_string_conversions.h"
 #include "grit/ui_resources.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura_shell/aura_shell_export.h"
 #include "ui/aura_shell/shell.h"
 #include "ui/aura_shell/shell_window_ids.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/canvas.h"
 #include "ui/views/widget/widget.h"
 
 namespace aura_shell {
 namespace internal {
 
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopBackgroundView, public:
 
 DesktopBackgroundView::DesktopBackgroundView() {
   wallpaper_ = *ResourceBundle::GetSharedInstance().GetBitmapNamed(
       IDR_AURA_WALLPAPER);
+  wallpaper_.buildMipMap(false);
 }
 
 DesktopBackgroundView::~DesktopBackgroundView() {
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopBackgroundView, views::View overrides:
 
 void DesktopBackgroundView::OnPaint(gfx::Canvas* canvas) {
-  canvas->TileImageInt(wallpaper_, 0, 0, width(), height());
+  canvas->DrawBitmapInt(wallpaper_,
+      0, 0, wallpaper_.width(), wallpaper_.height(),
+      0, 0, width(), height(),
+      true);
 }
 
 bool DesktopBackgroundView::OnMousePressed(const views::MouseEvent& event) {
   return true;
 }
 
 void DesktopBackgroundView::OnMouseReleased(const views::MouseEvent& event) {
   Shell::GetInstance()->ToggleOverview();
 }
 
 views::Widget* CreateDesktopBackground() {
   views::Widget* desktop_widget = new views::Widget;
   views::Widget::InitParams params(
       views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
   DesktopBackgroundView* view = new DesktopBackgroundView;
   params.delegate = view;
   desktop_widget->Init(params);
   Shell::GetInstance()->GetContainer(
       aura_shell::internal::kShellWindowId_DesktopBackgroundContainer)->
       AddChild(desktop_widget->GetNativeView());
   desktop_widget->SetContentsView(view);
   desktop_widget->Show();
   desktop_widget->GetNativeView()->SetName("DesktopBackgroundView");
   return desktop_widget;
 }
 
 }  // namespace internal
 }  // namespace aura_shell