Inline StringValue into base::Value

base/value_conversions.h

Index: base/value_conversions.h
diff --git a/base/value_conversions.h b/base/value_conversions.h
index 452c587cb84c51fb6ec223c390477d8364e77725..6ce1bff27e4d23f4ba096f348172cb542d64ac3c 100644
--- a/base/value_conversions.h
+++ b/base/value_conversions.h
@@ -14,8 +14,8 @@ namespace base {
 
 class FilePath;
 class TimeDelta;
-class StringValue;
 class Value;
+using StringValue = Value;
 
 // The caller takes ownership of the returned value.
 BASE_EXPORT StringValue* CreateFilePathValue(const FilePath& in_value);