[cros] OOBE: add histograms for Profile image fetching.

chrome/browser/chromeos/login/profile_image_downloader.h

Index: chrome/browser/chromeos/login/profile_image_downloader.h
diff --git a/chrome/browser/chromeos/login/profile_image_downloader.h b/chrome/browser/chromeos/login/profile_image_downloader.h
index 16ee46369718ae4c0a987dffd4951574e73a3e05..d0376665ce36137c50ba598aa8ebb3f9c45ec094 100644
--- a/chrome/browser/chromeos/login/profile_image_downloader.h
+++ b/chrome/browser/chromeos/login/profile_image_downloader.h
@@ -45,12 +45,7 @@ class ProfileImageDownloader : public URLFetcher::Delegate,
 
  private:
   // Overriden from URLFetcher::Delegate:
-  virtual void OnURLFetchComplete(const URLFetcher* source,
-                                  const GURL& url,
-                                  const net::URLRequestStatus& status,
-                                  int response_code,
-                                  const net::ResponseCookies& cookies,
-                                  const std::string& data) OVERRIDE;
+  virtual void OnURLFetchComplete(const URLFetcher* source) OVERRIDE;
 
   // Overriden from ImageDecoder::Delegate:
   virtual void OnImageDecoded(const ImageDecoder* decoder,
@@ -81,4 +76,3 @@ class ProfileImageDownloader : public URLFetcher::Delegate,
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_PROFILE_IMAGE_DOWNLOADER_H_
-