[WIP] make GURL::path() return a StringPiece

components/omnibox/browser/builtin_provider.cc

Index: components/omnibox/browser/builtin_provider.cc
diff --git a/components/omnibox/browser/builtin_provider.cc b/components/omnibox/browser/builtin_provider.cc
index 35fb3a8225156557c15796640f358dd59afb8b6a..704d37496b2e8574c454589ef377bf57d2bbc838 100644
--- a/components/omnibox/browser/builtin_provider.cc
+++ b/components/omnibox/browser/builtin_provider.cc
@@ -91,7 +91,8 @@ void BuiltinProvider::Start(const AutocompleteInput& input,
       }
 
       // Include the path for sub-pages (e.g. "chrome://settings/browser").
-      base::string16 host_and_path = base::UTF8ToUTF16(url.host() + url.path());
+      base::string16 host_and_path =
+          base::UTF8ToUTF16(url.host() + url.path().as_string());
       base::TrimString(host_and_path, base::ASCIIToUTF16("/"), &host_and_path);
       size_t match_length = embedderAbout.length() + host_and_path.length();
       for (Builtins::const_iterator i(builtins_.begin());