Move navigations with POST or referrer to the shell.

mojo/shell/local_fetcher.cc

Index: mojo/shell/local_fetcher.cc
diff --git a/mojo/shell/local_fetcher.cc b/mojo/shell/local_fetcher.cc
index ff7f7d4e8b2fe3024a1b150a0dfefc5905761f8a..bdb862edd2c508947947a5e995b42c2b5bb1c352 100644
--- a/mojo/shell/local_fetcher.cc
+++ b/mojo/shell/local_fetcher.cc
@@ -45,6 +45,10 @@ GURL LocalFetcher::GetRedirectURL() const {
   return GURL::EmptyGURL();
 }
 
+GURL LocalFetcher::GetRedirectReferer() const {
+  return GURL::EmptyGURL();
+}
+
 URLResponsePtr LocalFetcher::AsURLResponse(base::TaskRunner* task_runner,
                                            uint32_t skip) {
   URLResponsePtr response(URLResponse::New());