Fetch a new GAIA picture every time chrome://settings/manageProfile comes up.

chrome/browser/ui/webui/options/manage_profile_handler.cc

 // Copyright (c) 2013 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.
 
 #include "chrome/browser/ui/webui/options/manage_profile_handler.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
@@ skipping 164 matching lines @@
   web_ui()->RegisterMessageCallback("switchAppListProfile",
       base::Bind(&ManageProfileHandler::SwitchAppListProfile,
                  base::Unretained(this)));
 #endif
   web_ui()->RegisterMessageCallback("addProfileShortcut",
       base::Bind(&ManageProfileHandler::AddProfileShortcut,
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback("removeProfileShortcut",
       base::Bind(&ManageProfileHandler::RemoveProfileShortcut,
                  base::Unretained(this)));
+  web_ui()->RegisterMessageCallback("refreshGaiaPicture",
+      base::Bind(&ManageProfileHandler::RefreshGaiaPicture,
+                 base::Unretained(this)));
 }
 
 void ManageProfileHandler::Uninitialize() {
   registrar_.RemoveAll();
 }
 
 void ManageProfileHandler::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
@@ skipping 318 matching lines @@
   ProfileShortcutManager* shortcut_manager =
     g_browser_process->profile_manager()->profile_shortcut_manager();
   DCHECK(shortcut_manager);
 
   shortcut_manager->RemoveProfileShortcuts(profile_file_path);
 
   // Update the UI buttons.
   OnHasProfileShortcuts(false);
 }
 
+void ManageProfileHandler::RefreshGaiaPicture(const base::ListValue* args) {
+  profiles::UpdateGaiaProfilePhotoIfNeeded(Profile::FromWebUI(web_ui()));
+}
+
 }  // namespace options