Add NetworkChangeNotifier connectivity events to the NetLog.

net/base/network_change_notifier.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 "net/base/network_change_notifier.h"
 
 #include "base/metrics/histogram.h"
 #include "base/synchronization/lock.h"
 #include "build/build_config.h"
 #include "googleurl/src/gurl.h"
@@ skipping 234 matching lines @@
 // static
 void NetworkChangeNotifier::GetDnsConfig(DnsConfig* config) {
   if (!g_network_change_notifier) {
     *config = DnsConfig();
   } else {
     g_network_change_notifier->network_state_->GetDnsConfig(config);
   }
 }
 
 // static
+const char* NetworkChangeNotifier::ConnectionTypeToString(
+    ConnectionType type) {
+  static const char* kConnectionTypeNames[] = {
+    "CONNECTION_UNKNOWN",
+    "CONNECTION_ETHERNET",
+    "CONNECTION_WIFI",
+    "CONNECTION_2G",
+    "CONNECTION_3G",
+    "CONNECTION_4G",
+    "CONNECTION_NONE"
+  };
+  COMPILE_ASSERT(
+      arraysize(kConnectionTypeNames) ==
+          NetworkChangeNotifier::CONNECTION_NONE + 1,
+      ConnectionType_name_count_mismatch);
+  if (type < CONNECTION_UNKNOWN || type > CONNECTION_NONE) {
+    NOTREACHED();
+    return "CONNECTION_INVALID";
+  }
+  return kConnectionTypeNames[type];
+}
+
+// static
 void NetworkChangeNotifier::NotifyDataReceived(const GURL& source) {
   if (!g_network_change_notifier)
     return;
   g_network_change_notifier->histogram_watcher_->NotifyDataReceived(source);
 }
 
 // static
 void NetworkChangeNotifier::InitHistogramWatcher() {
   if (!g_network_change_notifier)
     return;
@@ skipping 117 matching lines @@
   DCHECK(g_network_change_notifier);
   g_network_change_notifier = NULL;
 }
 
 NetworkChangeNotifier::DisableForTest::~DisableForTest() {
   DCHECK(!g_network_change_notifier);
   g_network_change_notifier = network_change_notifier_;
 }
 
 }  // namespace net