[cros] Cache the URL of user's G+ profile photo to prevent redundant downloads.

chrome/browser/chromeos/login/user_image.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_USER_IMAGE_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_USER_IMAGE_H_
 #pragma once
 
 #include <vector>
 
+#include "googleurl/src/gurl.h"
 #include "ui/gfx/image/image_skia.h"
 
 namespace chromeos {
 
 // Wrapper class for bitmaps and raw images when it's necessary. Could
 // be used for storing profile images (including animated profile
 // images) and user wallpapers.
 class UserImage {
  public:
   typedef std::vector<unsigned char> RawImage;
@@ skipping 17 matching lines @@
 
   // Returns true iff |image| argument of constructors or |SetImage|
   // can be encoded as a bitmap.
   bool has_raw_image() const { return has_raw_image_; }
   const RawImage& raw_image() const { return raw_image_; }
 
   // Returns true iff UserImage is constructed from animated image.
   bool has_animated_image() const { return has_animated_image_; }
   const RawImage& animated_image() const { return animated_image_; }
 
+  // URL from which this image was originally downloaded, if any.
+  void set_url(const GURL& url) { url_ = url; }
+  GURL url() const { return url_; }
+
  private:
   gfx::ImageSkia image_;
   bool has_raw_image_;
   RawImage raw_image_;
   bool has_animated_image_;
   RawImage animated_image_;
+  GURL url_;
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USER_IMAGE_H_