Load 2x resources on demand

chrome/browser/chromeos/login/user_image.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 "chrome/browser/chromeos/login/user_image.h"
 
+#include "base/logging.h"
 #include "ui/gfx/codec/png_codec.h"
 
 namespace chromeos {
 
 namespace {
 
 bool IsAnimatedImage(const UserImage::RawImage& data) {
   const char kGIFStamp[] = "GIF";
   const size_t kGIFStampLength = sizeof(kGIFStamp) - 1;
 
@@ skipping 24 matching lines @@
 
 UserImage::UserImage()
     : has_raw_image_(false),
       has_animated_image_(false) {
 }
 
 UserImage::UserImage(const gfx::ImageSkia& image)
     : image_(image),
       has_raw_image_(false),
       has_animated_image_(false) {
+  DCHECK(image.IsReadOnly());
 }
 
 UserImage::UserImage(const gfx::ImageSkia& image,
                      const RawImage& raw_image)
     : image_(image),
       has_raw_image_(false),
       has_animated_image_(false) {
+  DCHECK(image.IsReadOnly());
   if (IsAnimatedImage(raw_image)) {
     has_animated_image_ = true;
     animated_image_ = raw_image;
     if (EncodeBGRAImageSkia(image_, false, &raw_image_))
       has_raw_image_ = true;
   } else {
     has_raw_image_ = true;
     raw_image_ = raw_image;
   }
 }
 
 UserImage::~UserImage() {}
 
 void UserImage::DiscardRawImage() {
   RawImage().swap(raw_image_);  // Clear |raw_image_|.
 }
 
 }  // namespace chromeos