Rename ash desktop_background to wallpaper.

ash/shell_unittest.cc

Index: ash/shell_unittest.cc
diff --git a/ash/shell_unittest.cc b/ash/shell_unittest.cc
index 5ff61ff2981fc8698b0f9f60510e805303821906..32d7813e44f9f1a874f8a5d8e3835e9082c30eba 100644
--- a/ash/shell_unittest.cc
+++ b/ash/shell_unittest.cc
@@ -14,12 +14,12 @@
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/shell_window_ids.h"
 #include "ash/common/wm_shell.h"
-#include "ash/desktop_background/desktop_background_widget_controller.h"
 #include "ash/display/mouse_cursor_event_filter.h"
 #include "ash/drag_drop/drag_drop_controller.h"
 #include "ash/root_window_controller.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/shell_test_api.h"
+#include "ash/wallpaper/wallpaper_widget_controller.h"
 #include "ash/wm/window_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ -57,8 +57,8 @@ aura::Window* GetAlwaysOnTopContainer() {
 // Expect ALL the containers!
 void ExpectAllContainers() {
   aura::Window* root_window = Shell::GetPrimaryRootWindow();
-  EXPECT_TRUE(Shell::GetContainer(root_window,
-                                  kShellWindowId_DesktopBackgroundContainer));
+  EXPECT_TRUE(
+      Shell::GetContainer(root_window, kShellWindowId_WallpaperContainer));
   EXPECT_TRUE(
       Shell::GetContainer(root_window, kShellWindowId_DefaultContainer));
   EXPECT_TRUE(
@@ -67,8 +67,8 @@ void ExpectAllContainers() {
   EXPECT_TRUE(Shell::GetContainer(root_window, kShellWindowId_ShelfContainer));
   EXPECT_TRUE(
       Shell::GetContainer(root_window, kShellWindowId_SystemModalContainer));
-  EXPECT_TRUE(Shell::GetContainer(
-      root_window, kShellWindowId_LockScreenBackgroundContainer));
+  EXPECT_TRUE(Shell::GetContainer(root_window,
+                                  kShellWindowId_LockScreenWallpaperContainer));
   EXPECT_TRUE(
       Shell::GetContainer(root_window, kShellWindowId_LockScreenContainer));
   EXPECT_TRUE(Shell::GetContainer(root_window,
@@ -377,14 +377,14 @@ TEST_F(ShellTest, ManagedWindowModeBasics) {
   EXPECT_EQ(0, shelf_widget->GetWindowBoundsInScreen().x());
   EXPECT_EQ(Shell::GetPrimaryRootWindow()->GetHost()->GetBounds().height(),
             shelf_widget->GetWindowBoundsInScreen().bottom());
-  // We have a desktop background but not a bare layer.
+  // We have a wallpaper but not a bare layer.
   // TODO (antrim): enable once we find out why it fails component build.
-  //  DesktopBackgroundWidgetController* background =
+  //  WallpaperWidgetController* wallpaper =
   //      Shell::GetPrimaryRootWindow()->
   //          GetProperty(kWindowDesktopComponent);
-  //  EXPECT_TRUE(background);
-  //  EXPECT_TRUE(background->widget());
-  //  EXPECT_FALSE(background->layer());
+  //  EXPECT_TRUE(wallpaper);
+  //  EXPECT_TRUE(wallpaper->widget());
+  //  EXPECT_FALSE(wallpaper->layer());
 
   // Create a normal window.  It is not maximized.
   views::Widget::InitParams widget_params(