Revert of Fixing sigslot copy constructors.

webrtc/base/sigslot.h

Index: webrtc/base/sigslot.h
diff --git a/webrtc/base/sigslot.h b/webrtc/base/sigslot.h
index 45e0da216bf5c4acc09dd47f4e11c54edfbd2165..4534ec9dae4c4f5af97c068d1949ebf682d00c5c 100644
--- a/webrtc/base/sigslot.h
+++ b/webrtc/base/sigslot.h
@@ -407,12 +407,15 @@
 		_signal_base& operator= (_signal_base const& that);
 
 	public:
-		_signal_base(const _signal_base& o) : _signal_base_interface(&_signal_base::do_slot_disconnect, &_signal_base::do_slot_duplicate) {
+		_signal_base(const _signal_base& s) : _signal_base_interface(&_signal_base::do_slot_disconnect, &_signal_base::do_slot_duplicate) {
 			lock_block<mt_policy> lock(this);
-      for (const auto& connection : o.m_connected_slots)
-			{
-				connection.getdest()->signal_connect(this);
-				m_connected_slots.push_back(connection);
+			connections_list::const_iterator it = m_connected_slots.begin();
+			connections_list::const_iterator itEnd = m_connected_slots.end();
+			while(it != itEnd)
+			{
+				it->getdest()->signal_connect(this);
+				m_connected_slots.push_back(*it);
+				++it;
 			}
 		}
 
@@ -525,21 +528,13 @@
 		{
 		}
 
-		has_slots(has_slots const& o) : has_slots_interface(&has_slots::do_signal_connect, &has_slots::do_signal_disconnect, &has_slots::do_disconnect_all)
-    {
-			lock_block<mt_policy> lock(this);
-      for (auto* sender : o.m_senders) {
-        sender->slot_duplicate(&o, this);
-        m_senders.insert(sender);
-      }
-    }
-
 		~has_slots()
 		{
 			this->disconnect_all();
 		}
 
 	private:
+		has_slots(has_slots const&);
 		has_slots& operator= (has_slots const&);
 
 		static void do_signal_connect(has_slots_interface* p, _signal_base_interface* sender)