Make base::Value::TYPE a scoped enum.

content/shell/browser/shell_devtools_frontend.cc

Index: content/shell/browser/shell_devtools_frontend.cc
diff --git a/content/shell/browser/shell_devtools_frontend.cc b/content/shell/browser/shell_devtools_frontend.cc
index 6a81d71c7957a13b3bef481d59302ee1e837e3e4..43828c931da770159f3e06c243d3fc973e785b41 100644
--- a/content/shell/browser/shell_devtools_frontend.cc
+++ b/content/shell/browser/shell_devtools_frontend.cc
@@ -200,7 +200,7 @@ void ShellDevToolsFrontend::SetPreferences(const std::string& json) {
   if (!parsed || !parsed->GetAsDictionary(&dict))
     return;
   for (base::DictionaryValue::Iterator it(*dict); !it.IsAtEnd(); it.Advance()) {
-    if (!it.value().IsType(base::Value::TYPE_STRING))
+    if (!it.value().IsType(base::Value::Type::STRING))
       continue;
     preferences_.SetWithoutPathExpansion(it.key(), it.value().CreateDeepCopy());
   }