Implement the new Sync Confirmation dialog on Linux and Windows.

chrome/browser/profiles/profile_downloader_delegate.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_PROFILES_PROFILE_DOWNLOADER_DELEGATE_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_DOWNLOADER_DELEGATE_H_
 
 #include <string>
 
 #include "base/strings/string16.h"
@@ skipping 13 matching lines @@
     IMAGE_DECODE_FAILED  // Cannot decode fetched image.
   };
 
   virtual ~ProfileDownloaderDelegate() {}
 
   // Whether the delegate need profile picture to be downloaded.
   virtual bool NeedsProfilePicture() const = 0;
 
   // Returns the desired side length of the profile image. If 0, returns image
   // of the originally uploaded size.
-  virtual int GetDesiredImageSideLength() const = 0;
+  virtual unsigned int GetDesiredImageSideLength() const = 0;
 
   // Returns the cached URL. If the cache URL matches the new image URL
   // the image will not be downloaded. Return an empty string when there is no
   // cached URL.
   virtual std::string GetCachedPictureURL() const = 0;
 
   // Returns the browser profile associated with this download request.
   virtual Profile* GetBrowserProfile() = 0;
 
   // Returns true if the profile download is taking place before the user has
   // signed in. This can happen for example on Android and will trigger some
   // additional fetches since some information is not yet available.
   virtual bool IsPreSignin() const = 0;
 
   // Called when the profile download has completed successfully. Delegate can
   // query the downloader for the picture and full name.
   virtual void OnProfileDownloadSuccess(ProfileDownloader* downloader) = 0;
 
   // Called when the profile download has failed.
   virtual void OnProfileDownloadFailure(
       ProfileDownloader* downloader,
       ProfileDownloaderDelegate::FailureReason reason) = 0;
 };
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_DOWNLOADER_DELEGATE_H_