Extracting NetLog inner classes into their own classes.

net/log/net_log_source.cc

+// Copyright 2016 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 "net/log/net_log_source.h"
+
+#include <memory>
+#include <utility>
+
+#include "base/bind.h"
+#include "base/callback.h"
+#include "base/logging.h"
+#include "base/values.h"
+#include "net/log/net_log_capture_mode.h"
+
+namespace net {
+
+namespace {
+
+std::unique_ptr<base::Value> SourceEventParametersCallback(
+    const NetLogSource source,
+    NetLogCaptureMode /* capture_mode */) {
+  if (!source.IsValid())
+    return std::unique_ptr<base::Value>();
+  std::unique_ptr<base::DictionaryValue> event_params(
+      new base::DictionaryValue());
+  source.AddToEventParameters(event_params.get());
+  return std::move(event_params);
+}
+
+}  // namespace
+
+// LoadTimingInfo requires this be 0.
+const uint32_t NetLogSource::kInvalidId = 0;
+
+NetLogSource::NetLogSource() : type(NetLogSourceType::NONE), id(kInvalidId) {}
+
+NetLogSource::NetLogSource(NetLogSourceType type, uint32_t id)
+    : type(type), id(id) {}
+
+bool NetLogSource::IsValid() const {
+  return id != kInvalidId;
+}
+
+void NetLogSource::AddToEventParameters(
+    base::DictionaryValue* event_params) const {
+  std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue());
+  dict->SetInteger("type", static_cast<int>(type));
+  dict->SetInteger("id", static_cast<int>(id));
+  event_params->Set("source_dependency", std::move(dict));
+}
+
+NetLogParametersCallback NetLogSource::ToEventParametersCallback() const {
+  return base::Bind(&SourceEventParametersCallback, *this);
+}
+
+// static
+bool NetLogSource::FromEventParameters(base::Value* event_params,
+                                       NetLogSource* source) {
+  base::DictionaryValue* dict = NULL;
+  base::DictionaryValue* source_dict = NULL;
+  int source_id = -1;
+  int source_type = static_cast<int>(NetLogSourceType::COUNT);
+  if (!event_params || !event_params->GetAsDictionary(&dict) ||
+      !dict->GetDictionary("source_dependency", &source_dict) ||
+      !source_dict->GetInteger("id", &source_id) ||
+      !source_dict->GetInteger("type", &source_type)) {
+    *source = NetLogSource();
+    return false;
+  }
+
+  DCHECK_GE(source_id, 0);
+  DCHECK_LT(source_type, static_cast<int>(NetLogSourceType::COUNT));
+  *source = NetLogSource(static_cast<NetLogSourceType>(source_type), source_id);
+  return true;
+}
+
+}  // namespace net