Fix crash in P2P IPC host.

content/browser/renderer_host/p2p_sockets_host.cc

Index: content/browser/renderer_host/p2p_sockets_host.cc
diff --git a/content/browser/renderer_host/p2p_sockets_host.cc b/content/browser/renderer_host/p2p_sockets_host.cc
index 310bd1dcfa9b19c39ea5722f8469f4ef67f5368e..aa2ef0af4865deac86ba3a1da1c13922ad657e06 100644
--- a/content/browser/renderer_host/p2p_sockets_host.cc
+++ b/content/browser/renderer_host/p2p_sockets_host.cc
@@ -17,7 +17,8 @@ void P2PSocketsHost::OnChannelClosing() {
   BrowserMessageFilter::OnChannelClosing();
 
   // Since the IPC channel is gone, close pending connections.
-  for (IDMap<P2PSocketHost>::iterator i(&sockets_); !i.IsAtEnd(); i.Advance()) {
+  for (IDMap<P2PSocketHost, IDMapOwnPointer>::iterator i(&sockets_);
+       !i.IsAtEnd(); i.Advance()) {
     sockets_.Remove(i.GetCurrentKey());
   }
 }