Refactor net::NetLog to provide implementation of observer pattern, not just the interface.

net/tools/gdig/file_net_log.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdio.h>
 
 #include "base/json/json_string_value_serializer.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/values.h"
 #include "net/tools/gdig/file_net_log.h"
 
 namespace net {
 
-FileNetLog::FileNetLog(FILE* destination, LogLevel level)
-    : log_level_(level),
-      destination_(destination) {
+FileNetLogObserver::FileNetLogObserver(FILE* destination)
+    : destination_(destination) {
   DCHECK(destination != NULL);
-  // Without calling GetNext() once here, the first GetNext will return 0
-  // that is not a valid id.
-  sequence_number_.GetNext();
 }
 
-FileNetLog::~FileNetLog() {
+FileNetLogObserver::~FileNetLogObserver() {
 }
 
-void FileNetLog::OnAddEntry(const net::NetLog::Entry& entry) {
+void FileNetLogObserver::OnAddEntry(const net::NetLog::Entry& entry) {
   // Only BoundNetLogs without a NetLog should have an invalid source.
   DCHECK(entry.source().IsValid());
 
-  const char* source = SourceTypeToString(entry.source().type);
-  const char* type = EventTypeToString(entry.type());
+  const char* source = NetLog::SourceTypeToString(entry.source().type);
+  const char* type = NetLog::EventTypeToString(entry.type());
 
   scoped_ptr<Value> param_value(entry.ParametersToValue());
   std::string params;
   if (param_value.get() != NULL) {
     JSONStringValueSerializer serializer(&params);
     bool ret = serializer.Serialize(*param_value);
     DCHECK(ret);
   }
   base::Time now = base::Time::NowFromSystemTime();
   base::AutoLock lock(lock_);
   if (first_event_time_.is_null()) {
     first_event_time_ = now;
   }
   base::TimeDelta elapsed_time = now - first_event_time_;
   fprintf(destination_ , "%u\t%u\t%s\t%s\t%s\n",
           static_cast<unsigned>(elapsed_time.InMilliseconds()),
           entry.source().id, source, type, params.c_str());
 }
 
-uint32 FileNetLog::NextID() {
-  return sequence_number_.GetNext();
-}
-
-NetLog::LogLevel FileNetLog::GetLogLevel() const {
-  return log_level_;
-}
-
-void FileNetLog::AddThreadSafeObserver(
-    NetLog::ThreadSafeObserver* observer,
-    NetLog::LogLevel log_level) {
-  NOTIMPLEMENTED() << "Not currently used by gdig.";
-}
-
-void FileNetLog::SetObserverLogLevel(ThreadSafeObserver* observer,
-                                          LogLevel log_level) {
-  NOTIMPLEMENTED() << "Not currently used by gdig.";
-}
-
-void FileNetLog::RemoveThreadSafeObserver(
-    NetLog::ThreadSafeObserver* observer) {
-  NOTIMPLEMENTED() << "Not currently used by gdig.";
-}
-
 }  // namespace net