Fix potential threading issues in NetworkChangeNotifierAndroid.

net/android/network_change_notifier_factory_android.h

Index: net/android/network_change_notifier_factory_android.h
diff --git a/net/android/network_change_notifier_factory_android.h b/net/android/network_change_notifier_factory_android.h
index d4bd99fbec0dd2733497a79e57280528a6be32e6..e22ebc7a4f90c23de775e186b29233530158e837 100644
--- a/net/android/network_change_notifier_factory_android.h
+++ b/net/android/network_change_notifier_factory_android.h
@@ -8,6 +8,12 @@
 #include "base/compiler_specific.h"
 #include "net/base/network_change_notifier_factory.h"
 
+namespace base {
+
+class TaskRunner;
+
+}  // namespace base
+
 namespace net {
 
 class NetworkChangeNotifier;
@@ -17,11 +23,14 @@ class NetworkChangeNotifier;
 class NetworkChangeNotifierFactoryAndroid :
     public NetworkChangeNotifierFactory {
  public:
-  NetworkChangeNotifierFactoryAndroid();
+  NetworkChangeNotifierFactoryAndroid(base::TaskRunner* ui_task_runner);
   virtual ~NetworkChangeNotifierFactoryAndroid();
 
   // Overrides of NetworkChangeNotifierFactory.
   virtual NetworkChangeNotifier* CreateInstance() OVERRIDE;
+
+ private:
+  base::TaskRunner* const ui_task_runner_;
 };
 
 }  // namespace net