Initial checkin of the out of process worker implementation....

chrome/common/child_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/common/child_process_host.h"
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/singleton.h"
@@ skipping 136 matching lines @@
   host_->Notify(NotificationType::CHILD_PROCESS_HOST_CONNECTED);
 }
 
 void ChildProcessHost::ListenerHook::OnChannelError() {
   host_->opening_channel_ = false;
   host_->OnChannelError();
 }
 
 
 ChildProcessHost::Iterator::Iterator() : all_(true) {
-  iterator_ = Singleton<ChildProcessList>::get()->begin();
   DCHECK(MessageLoop::current() ==
       ChromeThread::GetMessageLoop(ChromeThread::IO)) <<
           "ChildProcessInfo::Iterator must be used on the IO thread.";
+  iterator_ = Singleton<ChildProcessList>::get()->begin();
 }
 
 ChildProcessHost::Iterator::Iterator(ProcessType type)
     : all_(false), type_(type) {
-  iterator_ = Singleton<ChildProcessList>::get()->begin();
   DCHECK(MessageLoop::current() ==
       ChromeThread::GetMessageLoop(ChromeThread::IO)) <<
           "ChildProcessInfo::Iterator must be used on the IO thread.";
+  iterator_ = Singleton<ChildProcessList>::get()->begin();
+  if (!Done() && (*iterator_)->type() != type_)
+    iterator_++;
 }
 
 ChildProcessInfo* ChildProcessHost::Iterator::operator++() {
   do {
     ++iterator_;
     if (Done())
       break;
 
     if (!all_ && (*iterator_)->type() != type_)
       continue;
 
     return *iterator_;
   } while (true);
 
   return NULL;
 }
 
 bool ChildProcessHost::Iterator::Done() {
   return iterator_ == Singleton<ChildProcessList>::get()->end();
 }