Don't derive from ChromeURLDataManager::DataSource, and instead have these classes implement a dele…

chrome/browser/ui/webui/options/chromeos/user_image_source.cc

Index: chrome/browser/ui/webui/options/chromeos/user_image_source.cc
===================================================================
--- chrome/browser/ui/webui/options/chromeos/user_image_source.cc	(revision 176443)
+++ chrome/browser/ui/webui/options/chromeos/user_image_source.cc	(working copy)
@@ -9,6 +9,7 @@
 #include "base/string_split.h"
 #include "chrome/browser/chromeos/login/default_user_images.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
+#include "chrome/browser/ui/webui/chrome_url_data_manager.h"
 #include "chrome/browser/ui/webui/web_ui_util.h"
 #include "chrome/common/url_constants.h"
 #include "googleurl/src/url_parse.h"
@@ -76,12 +77,15 @@
       LoadDataResourceBytesForScale(IDR_LOGIN_DEFAULT_USER, scale_factor);
 }
 
-UserImageSource::UserImageSource()
-    : DataSource(chrome::kChromeUIUserImageHost, MessageLoop::current()) {
+UserImageSource::UserImageSource() {
 }
 
 UserImageSource::~UserImageSource() {}
 
+std::string UserImageSource::GetSource() {
+  return chrome::kChromeUIUserImageHost;
+}
+
 void UserImageSource::StartDataRequest(const std::string& path,
                                        bool is_incognito,
                                        int request_id) {
@@ -90,8 +94,9 @@
   ui::ScaleFactor scale_factor;
   GURL url(chrome::kChromeUIUserImageURL + path);
   ParseRequest(url, &email, &is_image_animated, &scale_factor);
-  SendResponse(request_id,
-               GetUserImage(email, is_image_animated, scale_factor));
+  url_data_source()->SendResponse(
+      request_id,
+      GetUserImage(email, is_image_animated, scale_factor));
 }
 
 std::string UserImageSource::GetMimeType(const std::string& path) const {