[cros] Don't succeed if user has default profile picturewq

chrome/browser/chromeos/login/profile_image_downloader.h

 // Copyright (c) 2011 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_PROFILE_IMAGE_DOWNLOADER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_PROFILE_IMAGE_DOWNLOADER_H_
 #pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/chromeos/login/image_decoder.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/common/url_fetcher_delegate.h"
 #include "googleurl/src/gurl.h"
 
 namespace chromeos {
 
 // Downloads user profile image, decodes it in a sandboxed process.
 class ProfileImageDownloader : public content::URLFetcherDelegate,
                                public ImageDecoder::Delegate,
                                public content::NotificationObserver {
  public:
+  // Enum for reporting histograms about profile picture download.
+  enum DownloadResult {
+    kDownloadSuccessChanged,
+    kDownloadSuccess,
+    kDownloadFailure,
+    kDownloadDefault,
+
+    // Must be the last, convenient count.
+    kDownloadResultsCount
+  };
+
   // Reports on success or failure of Profile image download.
   class Delegate {
    public:
     virtual ~Delegate() {}
 
     // Called when image is successfully downloaded and decoded.
     virtual void OnDownloadSuccess(const SkBitmap& image) = 0;
 
     // Called on download failure.
     virtual void OnDownloadFailure() {}
+
+    // Called when user has the default profile image and we won't download
+    // it.
+    virtual void OnDownloadDefaultImage() {}
   };
 
   explicit ProfileImageDownloader(Delegate* delegate);
   virtual ~ProfileImageDownloader();
 
   // Starts downloading the picture if the necessary authorization token is
   // ready. If not, subscribes to token service and starts fetching if the
   // token is available.
   void Start();
 
  private:
   // Overriden from content::URLFetcherDelegate:
   virtual void OnURLFetchComplete(const content::URLFetcher* source) OVERRIDE;
 
   // Overriden from ImageDecoder::Delegate:
   virtual void OnImageDecoded(const ImageDecoder* decoder,
                               const SkBitmap& decoded_image) OVERRIDE;
   virtual void OnDecodeImageFailed(const ImageDecoder* decoder) OVERRIDE;
 
   // Overriden from content::NotificationObserver:
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
   // Searches for profile image URL in user entry response from Picasa.
   // Returns an empty string on failure.
   std::string GetProfileImageURL(const std::string& data) const;
 
+  // Returns true if the image url is url of the default profile picture.
+  bool IsDefaultProfileImageURL(const std::string& url) const;
+
   // Issues the first request to get user profile image.
   void StartFetchingImage();
 
   Delegate* delegate_;
   std::string auth_token_;
   scoped_ptr<content::URLFetcher> user_entry_fetcher_;
   scoped_ptr<content::URLFetcher> profile_image_fetcher_;
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileImageDownloader);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_PROFILE_IMAGE_DOWNLOADER_H_