Add DCHECKs to validate ProfileIOData's list of protocols.

chrome/browser/renderer_context_menu/render_view_context_menu.cc

Index: chrome/browser/renderer_context_menu/render_view_context_menu.cc
diff --git a/chrome/browser/renderer_context_menu/render_view_context_menu.cc b/chrome/browser/renderer_context_menu/render_view_context_menu.cc
index a5297bf5eb9616d677baca558fe780c96f241bde..ab440e2f8346c40abbe7fc191998a89b192ce9e9 100644
--- a/chrome/browser/renderer_context_menu/render_view_context_menu.cc
+++ b/chrome/browser/renderer_context_menu/render_view_context_menu.cc
@@ -2055,7 +2055,7 @@ bool RenderViewContextMenu::IsSaveLinkAsEnabled() const {
     return false;
 
   return params_.link_url.is_valid() &&
-      ProfileIOData::IsHandledProtocol(params_.link_url.scheme());
+         ProfileIOData::IsBuiltInProtocol(params_.link_url.scheme());
 }
 
 bool RenderViewContextMenu::IsSaveImageAsEnabled() const {
@@ -2076,9 +2076,9 @@ bool RenderViewContextMenu::IsSaveAsEnabled() const {
     return false;
 
   const GURL& url = params_.src_url;
-  bool can_save =
-      (params_.media_flags & WebContextMenuData::MediaCanSave) &&
-      url.is_valid() && ProfileIOData::IsHandledProtocol(url.scheme());
+  bool can_save = (params_.media_flags & WebContextMenuData::MediaCanSave) &&
+                  url.is_valid() &&
+                  ProfileIOData::IsBuiltInProtocol(url.scheme());
 #if defined(ENABLE_PRINT_PREVIEW)
       // Do not save the preview PDF on the print preview page.
   can_save = can_save &&