Changed CreateWorker to coalesce any matching queued shared workers when a

chrome/browser/worker_host/worker_process_host.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/worker_host/worker_process_host.h"
 
 #include <set>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 152 matching lines @@
   ChildProcessSecurityPolicy::GetInstance()->GrantRequestURL(
       id(), instance.url());
 
   instances_.push_back(instance);
   Send(new WorkerProcessMsg_CreateWorker(instance.url(),
                                          instance.shared(),
                                          instance.name(),
                                          instance.worker_route_id()));
 
   UpdateTitle();
-  WorkerInstance::SenderInfo info = instances_.back().GetSender();
-  info.first->Send(new ViewMsg_WorkerCreated(info.second));
+
+  // Walk all pending senders and let them know the worker has been created
+  // (could be more than one in the case where we had to queue up worker
+  // creation because the worker process limit was reached).
+  for (WorkerInstance::SenderList::const_iterator i =
+           instance.senders().begin();
+       i != instance.senders().end(); ++i) {
+    i->first->Send(new ViewMsg_WorkerCreated(i->second));
+  }
 }
 
 bool WorkerProcessHost::FilterMessage(const IPC::Message& message,
                                       IPC::Message::Sender* sender) {
   for (Instances::iterator i = instances_.begin(); i != instances_.end(); ++i) {
     if (!i->closed() && i->HasSender(sender, message.routing_id())) {
       RelayMessage(
           message, this, i->worker_route_id(), next_route_id_callback_.get());
       return true;
     }
@@ skipping 352 matching lines @@
     }
   }
   return false;
 }
 
 WorkerProcessHost::WorkerInstance::SenderInfo
 WorkerProcessHost::WorkerInstance::GetSender() const {
   DCHECK(NumSenders() == 1);
   return *senders_.begin();
 }