Update CrOS to use scoped_refptr<T>::get() rather than implicit "operator T*"

ash/desktop_background/desktop_background_controller.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 "ash/desktop_background/desktop_background_controller.h"
 
 #include "ash/desktop_background/desktop_background_controller_observer.h"
 #include "ash/desktop_background/desktop_background_view.h"
 #include "ash/desktop_background/desktop_background_widget_controller.h"
 #include "ash/desktop_background/user_wallpaper_delegate.h"
@@ skipping 156 matching lines @@
   return WALLPAPER_LAYOUT_CENTER_CROPPED;
 }
 
 gfx::ImageSkia DesktopBackgroundController::GetCurrentWallpaperImage() {
   if (desktop_background_mode_ != BACKGROUND_IMAGE)
     return gfx::ImageSkia();
   return GetWallpaper();
 }
 
 int DesktopBackgroundController::GetWallpaperIDR() const {
-  if (wallpaper_loader_)
+  if (wallpaper_loader_.get())
     return wallpaper_loader_->idr();
   else if (current_wallpaper_)
     return current_wallpaper_->wallpaper_info().idr;
   else
     return -1;
 }
 
 void DesktopBackgroundController::OnRootWindowAdded(
     aura::RootWindow* root_window) {
   // The background hasn't been set yet.
@@ skipping 47 matching lines @@
   current_wallpaper_.reset(new WallpaperResizer(info, GetRootWindowsSize(),
                                                 wallpaper));
   current_wallpaper_->StartResize();
   FOR_EACH_OBSERVER(DesktopBackgroundControllerObserver, observers_,
                     OnWallpaperDataChanged());
   SetDesktopBackgroundImageMode();
 }
 
 void DesktopBackgroundController::CancelPendingWallpaperOperation() {
   // Set canceled flag of previous request to skip unneeded loading.
-  if (wallpaper_loader_)
+  if (wallpaper_loader_.get())
     wallpaper_loader_->Cancel();
 
   // Cancel reply callback for previous request.
   weak_ptr_factory_.InvalidateWeakPtrs();
 }
 
 void DesktopBackgroundController::SetDesktopBackgroundSolidColorMode(
     SkColor color) {
   background_color_ = color;
   desktop_background_mode_ = BACKGROUND_SOLID_COLOR;
@@ skipping 167 matching lines @@
   }
   return moved;
 }
 
 int DesktopBackgroundController::GetBackgroundContainerId(bool locked) {
   return locked ? internal::kShellWindowId_LockScreenBackgroundContainer :
                   internal::kShellWindowId_DesktopBackgroundContainer;
 }
 
 }  // namespace ash