diff --git a/webrtc/base/network.cc b/webrtc/base/network.cc
index 32fe2e6d6..ec672655d 100644
--- a/webrtc/base/network.cc
+++ b/webrtc/base/network.cc
@@ -151,6 +151,13 @@ void NetworkManagerBase::GetNetworks(NetworkList* result) const {
 
 void NetworkManagerBase::MergeNetworkList(const NetworkList& new_networks,
                                           bool* changed) {
+  NetworkManager::Stats stats;
+  MergeNetworkList(new_networks, changed, &stats);
+}
+
+void NetworkManagerBase::MergeNetworkList(const NetworkList& new_networks,
+                                          bool* changed,
+                                          NetworkManager::Stats* stats) {
   // AddressList in this map will track IP addresses for all Networks
   // with the same key.
   std::map<std::string, AddressList> consolidated_address_list;
@@ -185,6 +192,13 @@ void NetworkManagerBase::MergeNetworkList(const NetworkList& new_networks,
     }
     if (!might_add_to_merged_list) {
       delete network;
+    } else {
+      if (current_list.ips[0].family() == AF_INET) {
+        stats->ipv4_network_count++;
+      } else {
+        ASSERT(current_list.ips[0].family() == AF_INET6);
+        stats->ipv6_network_count++;
+      }
     }
   }
 
@@ -213,7 +227,7 @@ void NetworkManagerBase::MergeNetworkList(const NetworkList& new_networks,
   networks_ = merged_list;
 
   // If the network lists changes, we resort it.
-  if (changed) {
+  if (*changed) {
     std::sort(networks_.begin(), networks_.end(), SortNetworks);
     // Now network interfaces are sorted, we should set the preference value
     // for each of the interfaces we are planning to use.
diff --git a/webrtc/base/network.h b/webrtc/base/network.h
index 6f9d08e70..ee0673f40 100644
--- a/webrtc/base/network.h
+++ b/webrtc/base/network.h
@@ -76,6 +76,15 @@ class NetworkManager {
 
   // Dumps a list of networks available to LS_INFO.
   virtual void DumpNetworks(bool include_ignored) {}
+
+  struct Stats {
+    int ipv4_network_count;
+    int ipv6_network_count;
+    Stats() {
+      ipv4_network_count = 0;
+      ipv6_network_count = 0;
+    }
+  };
 };
 
 // Base class for NetworkManager implementations.
@@ -97,6 +106,11 @@ class NetworkManagerBase : public NetworkManager {
   // any change in the network list.
   void MergeNetworkList(const NetworkList& list, bool* changed);
 
+  // |stats| will be populated even if |*changed| is false.
+  void MergeNetworkList(const NetworkList& list,
+                        bool* changed,
+                        NetworkManager::Stats* stats);
+
  private:
   friend class NetworkTest;
   void DoUpdateNetworks();
diff --git a/webrtc/base/network_unittest.cc b/webrtc/base/network_unittest.cc
index acb118d4b..f54911592 100644
--- a/webrtc/base/network_unittest.cc
+++ b/webrtc/base/network_unittest.cc
@@ -34,10 +34,13 @@ class NetworkTest : public testing::Test, public sigslot::has_slots<>  {
     callback_called_ = true;
   }
 
-  void MergeNetworkList(BasicNetworkManager& network_manager,
-                        const NetworkManager::NetworkList& list,
-                        bool* changed ) {
-    network_manager.MergeNetworkList(list, changed);
+  NetworkManager::Stats MergeNetworkList(
+      BasicNetworkManager& network_manager,
+      const NetworkManager::NetworkList& list,
+      bool* changed) {
+    NetworkManager::Stats stats;
+    network_manager.MergeNetworkList(list, changed, &stats);
+    return stats;
   }
 
   bool IsIgnoredNetwork(BasicNetworkManager& network_manager,
@@ -182,8 +185,10 @@ TEST_F(NetworkTest, TestBasicMergeNetworkList) {
   NetworkManager::NetworkList list;
   list.push_back(new Network(ipv4_network1));
   bool changed;
-  MergeNetworkList(manager, list, &changed);
+  NetworkManager::Stats stats = MergeNetworkList(manager, list, &changed);
   EXPECT_TRUE(changed);
+  EXPECT_EQ(stats.ipv6_network_count, 0);
+  EXPECT_EQ(stats.ipv4_network_count, 1);
   list.clear();
 
   manager.GetNetworks(&list);
@@ -194,8 +199,10 @@ TEST_F(NetworkTest, TestBasicMergeNetworkList) {
 
   // Replace ipv4_network1 with ipv4_network2.
   list.push_back(new Network(ipv4_network2));
-  MergeNetworkList(manager, list, &changed);
+  stats = MergeNetworkList(manager, list, &changed);
   EXPECT_TRUE(changed);
+  EXPECT_EQ(stats.ipv6_network_count, 0);
+  EXPECT_EQ(stats.ipv4_network_count, 1);
   list.clear();
 
   manager.GetNetworks(&list);
@@ -207,8 +214,10 @@ TEST_F(NetworkTest, TestBasicMergeNetworkList) {
   // Add Network2 back.
   list.push_back(new Network(ipv4_network1));
   list.push_back(new Network(ipv4_network2));
-  MergeNetworkList(manager, list, &changed);
+  stats = MergeNetworkList(manager, list, &changed);
   EXPECT_TRUE(changed);
+  EXPECT_EQ(stats.ipv6_network_count, 0);
+  EXPECT_EQ(stats.ipv4_network_count, 2);
   list.clear();
 
   // Verify that we get previous instances of Network objects.
@@ -222,8 +231,10 @@ TEST_F(NetworkTest, TestBasicMergeNetworkList) {
   // notification.
   list.push_back(new Network(ipv4_network2));
   list.push_back(new Network(ipv4_network1));
-  MergeNetworkList(manager, list, &changed);
+  stats = MergeNetworkList(manager, list, &changed);
   EXPECT_FALSE(changed);
+  EXPECT_EQ(stats.ipv6_network_count, 0);
+  EXPECT_EQ(stats.ipv4_network_count, 2);
   list.clear();
 
   // Verify that we get previous instances of Network objects.
@@ -274,8 +285,11 @@ TEST_F(NetworkTest, TestIPv6MergeNetworkList) {
   NetworkManager::NetworkList original_list;
   SetupNetworks(&original_list);
   bool changed = false;
-  MergeNetworkList(manager, original_list, &changed);
+  NetworkManager::Stats stats =
+      MergeNetworkList(manager, original_list, &changed);
   EXPECT_TRUE(changed);
+  EXPECT_EQ(stats.ipv6_network_count, 4);
+  EXPECT_EQ(stats.ipv4_network_count, 0);
   NetworkManager::NetworkList list;
   manager.GetNetworks(&list);
   EXPECT_EQ(original_list.size(), list.size());