Move StringToUpperASCII to base namespace

extensions/renderer/runtime_custom_bindings.cc

Index: extensions/renderer/runtime_custom_bindings.cc
diff --git a/extensions/renderer/runtime_custom_bindings.cc b/extensions/renderer/runtime_custom_bindings.cc
index 483f08b7796d2f2c2f80634cf70a6d3ce9b1f680..c39ce0355c4cce4157a057c8b12dcf5682c58dab 100644
--- a/extensions/renderer/runtime_custom_bindings.cc
+++ b/extensions/renderer/runtime_custom_bindings.cc
@@ -129,7 +129,7 @@ void RuntimeCustomBindings::GetExtensionViews(
   int browser_window_id = args[0]->Int32Value();
 
   std::string view_type_string = *v8::String::Utf8Value(args[1]);
-  StringToUpperASCII(&view_type_string);
+  base::StringToUpperASCII(&view_type_string);
   // |view_type| == VIEW_TYPE_INVALID means getting any type of
   // views.
   ViewType view_type = VIEW_TYPE_INVALID;