Add more string_util functions to base namespace.

chrome/browser/shell_integration_win.cc

Index: chrome/browser/shell_integration_win.cc
diff --git a/chrome/browser/shell_integration_win.cc b/chrome/browser/shell_integration_win.cc
index 4e0af293dd33e493ef3c385ca1c15d3b9de7397a..d79b217ccceb10bec368adc6412f4787ba90121a 100644
--- a/chrome/browser/shell_integration_win.cc
+++ b/chrome/browser/shell_integration_win.cc
@@ -219,10 +219,10 @@ base::string16 GetAppForProtocolUsingRegistry(const GURL& url) {
                                                     url_spec.length() - 1);
   base::string16 application_to_launch;
   if (cmd_key.ReadValue(NULL, &application_to_launch) == ERROR_SUCCESS) {
-    ReplaceSubstringsAfterOffset(&application_to_launch,
-                                 0,
-                                 L"%1",
-                                 parameters);
+    base::ReplaceSubstringsAfterOffset(&application_to_launch,
+                                       0,
+                                       L"%1",
+                                       parameters);
     return application_to_launch;
   }
   return base::string16();