Move RegisterContentSchemes from public url_constants into non-public url_schemes.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index ad6fef0853fa3535bb0ade426d96f2965cd6b32e..9b42981ab01652457162050338b9da0a06e9b073 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -4577,7 +4577,7 @@ void RenderViewImpl::OnGetAllSavableResourceLinksForCurrentPage(
           webview(),
           page_url,
           &result,
-          content::GetSavableSchemes())) {
+          const_cast<const char**>(content::GetSavableSchemes()))) {
     // If something is wrong when collecting all savable resource links,
     // send empty list to embedder(browser) to tell it failed.
     referrer_urls_list.clear();