Remove base::StringValue

tools/gn/command_desc.cc

Index: tools/gn/command_desc.cc
diff --git a/tools/gn/command_desc.cc b/tools/gn/command_desc.cc
index 1de9fbb12da098508eb2898209a7f4f4882e3855..8e4ebd7e7c0bbc73679ebcce40cca7154751c26b 100644
--- a/tools/gn/command_desc.cc
+++ b/tools/gn/command_desc.cc
@@ -85,7 +85,7 @@ void VisibilityHandler(const std::string& name, const base::Value* value) {
   const base::ListValue* list;
   if (value->GetAsList(&list)) {
     if (list->empty()) {
-      base::StringValue str("(no visibility)");
+      base::Value str("(no visibility)");
       DefaultHandler(name, &str);
     } else {
       DefaultHandler(name, value);
@@ -97,7 +97,7 @@ void PublicHandler(const std::string& name, const base::Value* value) {
   std::string p;
   if (value->GetAsString(&p)) {
     if (p == "*") {
-      base::StringValue str("[All headers listed in the sources are public.]");
+      base::Value str("[All headers listed in the sources are public.]");
       DefaultHandler(name, &str);
       return;
     }