Fix NamedProxyLauncher on Windows.

ipc/ipc_channel_win.cc

 // Copyright (c) 2011 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 "ipc/ipc_channel_win.h"
 
 #include <windows.h>
 
 #include "base/auto_reset.h"
 #include "base/compiler_specific.h"
@@ skipping 75 matching lines @@
   if (!waiting_connect_) {
     if (!output_state_.is_pending) {
       if (!ProcessOutgoingMessages(NULL, 0))
         return false;
     }
   }
 
   return true;
 }
 
+// static
+bool Channel::ChannelImpl::IsNamedServerInitialized(
+    const std::string& channel_id) {
+  if (WaitNamedPipe(PipeName(channel_id).c_str(), 1))
+    return true;
+  // If ERROR_SEM_TIMEOUT occurred, the pipe exists but is handling another
+  // connection.
+  return GetLastError() == ERROR_SEM_TIMEOUT;
+}
+
+// static
 const std::wstring Channel::ChannelImpl::PipeName(
-    const std::string& channel_id) const {
+    const std::string& channel_id) {
   std::string name("\\\\.\\pipe\\chrome.");
   return ASCIIToWide(name.append(channel_id));
 }
 
 bool Channel::ChannelImpl::CreatePipe(const IPC::ChannelHandle &channel_handle,
                                       Mode mode) {
   DCHECK_EQ(INVALID_HANDLE_VALUE, pipe_);
   const std::wstring pipe_name = PipeName(channel_handle.name);
   if (mode & MODE_SERVER_FLAG) {
     pipe_ = CreateNamedPipeW(pipe_name.c_str(),
@@ skipping 296 matching lines @@
 }
 
 void Channel::set_listener(Listener* listener) {
   channel_impl_->set_listener(listener);
 }
 
 bool Channel::Send(Message* message) {
   return channel_impl_->Send(message);
 }
 
+// static
+bool Channel::IsNamedServerInitialized(const std::string& channel_id) {
+  return ChannelImpl::IsNamedServerInitialized(channel_id);
+}
+
 }  // namespace IPC