POSIX: Don't allow onunload handlers to hang a renderer forever.

chrome/common/ipc_channel_proxy.cc

Index: chrome/common/ipc_channel_proxy.cc
diff --git a/chrome/common/ipc_channel_proxy.cc b/chrome/common/ipc_channel_proxy.cc
index 47aa89bb7dd41d67a0a0b421984ccbda4c288aea..c43f01f04c2f351e58dbf70e5320a6cdeb9f0b96 100644
--- a/chrome/common/ipc_channel_proxy.cc
+++ b/chrome/common/ipc_channel_proxy.cc
@@ -81,6 +81,9 @@ void ChannelProxy::Context::OnChannelConnected(int32 peer_pid) {
 
 // Called on the IPC::Channel thread
 void ChannelProxy::Context::OnChannelError() {
+  for (size_t i = 0; i < filters_.size(); ++i)
+    filters_[i]->OnChannelError();
+
   // See above comment about using listener_message_loop_ here.
   listener_message_loop_->PostTask(FROM_HERE, NewRunnableMethod(
       this, &Context::OnDispatchError));