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

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

Index: chrome/browser/ui/webui/options/manage_profile_handler.h
diff --git a/chrome/browser/ui/webui/options/manage_profile_handler.h b/chrome/browser/ui/webui/options/manage_profile_handler.h
index c9801ca3a99207c85b4beccb0755d0ab02c82c11..226f5d60d3d3ba103583f74661de7686cefab0c9 100644
--- a/chrome/browser/ui/webui/options/manage_profile_handler.h
+++ b/chrome/browser/ui/webui/options/manage_profile_handler.h
@@ -122,6 +122,10 @@ class ManageProfileHandler : public OptionsPageUIHandler,
   // shortcut" button. Removes the desktop shortcut for the profile.
   void RemoveProfileShortcut(const base::ListValue* args);
 
+  // Callback for the "refreshGAIAPicture" message, which is called when the
+  // user pressed "Edit" for an existing profile.
+  void RefreshGaiaPicture(const base::ListValue* args);
+
   // URL for the current profile's GAIA picture.
   std::string gaia_picture_url_;