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

chrome/test/chromedriver/capabilities.cc

Index: chrome/test/chromedriver/capabilities.cc
diff --git a/chrome/test/chromedriver/capabilities.cc b/chrome/test/chromedriver/capabilities.cc
index 60ad11cd71f64c961a035e5b0798d5feee7e39c7..28d42ab5a9a46a4bb7717a9895f7255f3681afe1 100644
--- a/chrome/test/chromedriver/capabilities.cc
+++ b/chrome/test/chromedriver/capabilities.cc
@@ -257,7 +257,7 @@ Status ParseProxy(const base::Value& option, Capabilities* capabilities) {
     std::string proxy_servers;
     for (size_t i = 0; i < arraysize(proxy_servers_options); ++i) {
       if (!proxy_dict->Get(proxy_servers_options[i][0], &option_value) ||
-          option_value->IsType(base::Value::TYPE_NULL)) {
+          option_value->IsType(base::Value::Type::NONE)) {
         continue;
       }
       std::string value;
@@ -277,7 +277,7 @@ Status ParseProxy(const base::Value& option, Capabilities* capabilities) {
 
     std::string proxy_bypass_list;
     if (proxy_dict->Get("noProxy", &option_value) &&
-        !option_value->IsType(base::Value::TYPE_NULL)) {
+        !option_value->IsType(base::Value::Type::NONE)) {
       if (!option_value->GetAsString(&proxy_bypass_list))
         return Status(kUnknownError, "'noProxy' must be a string");
     }