Extracted NetLog class's inner enum types into their own enum classes and

components/cronet/android/url_request_context_adapter.cc

Index: components/cronet/android/url_request_context_adapter.cc
diff --git a/components/cronet/android/url_request_context_adapter.cc b/components/cronet/android/url_request_context_adapter.cc
index 69e10860c67c874897a0d5a640b57a171553d669..538050e31042dd45b4c67c6283a41416cf36fff9 100644
--- a/components/cronet/android/url_request_context_adapter.cc
+++ b/components/cronet/android/url_request_context_adapter.cc
@@ -316,8 +316,9 @@ void URLRequestContextAdapter::StopNetLogHelper() {
 }
 
 void NetLogObserver::OnAddEntry(const net::NetLog::Entry& entry) {
-  VLOG(2) << "Net log entry: type=" << entry.type()
-          << ", source=" << entry.source().type << ", phase=" << entry.phase();
+  VLOG(2) << "Net log entry: type=" << static_cast<int>(entry.type())
+          << ", source=" << static_cast<int>(entry.source().type)
+          << ", phase=" << static_cast<int>(entry.phase());
 }
 
 }  // namespace cronet