Add multi-process notification class.

chrome/common/multi_process_notification_linux.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 "chrome/common/multi_process_notification.h"
+
+namespace multi_process_notification {
+
+bool Post(const std::string& name) {
+  // TODO(dmaclach): Implement
+  NOTIMPLEMENTED();

[Mark Mentovai, 2011/01/04 18:19:33]

#include "base/logging.h"

[dmac, 2011/01/06 06:06:03]

Done.

+  return false;
+}
+
+class ListenerImpl {
+ public:
+  ListenerImpl(const std::string& name,
+               Listener::Delegate* delegate);
+  virtual ~ListenerImpl();

[Mark Mentovai, 2011/01/04 18:19:33]

Q. Why is this virtual?

A. Because Start() is virtual.

Q. Why is Start() virtual?

A. ?

For the purposes of this class as it stands now, I don’t think you need to
declare any destructor at all (or define any destructor, lines 33-34).

[dmac, 2011/01/06 06:06:03]

Done.

+
+  virtual bool Start();
+
+ private:
+  std::string name_;
+  Listener::Delegate* delegate_;
+};
+
+ListenerImpl::ListenerImpl(const std::string& name,
+                           Listener::Delegate* delegate)
+    : name_(name), delegate_(delegate) {
+}
+
+ListenerImpl::~ListenerImpl() {
+}
+
+bool ListenerImpl::Start() {
+  // TODO(dmaclach): Implement
+  NOTIMPLEMENTED();
+  return false;
+}
+
+Listener::Listener(const std::string& name, Listener::Delegate* delegate)

[Mark Mentovai, 2011/01/04 18:19:33]

Wait a sec. This is how you’re doing your factory? Then does Listener actually
need to have anything declared virtual?

I get the sense that you wrote this with the platform split being handled
differently, and then changed it up once or twice along the way. No biggie, but
let’s make sure the split is handled well, and get rid of the leftover stuff
from the rewrites.

[dmac, 2011/01/06 06:06:03]

Done.

+    : impl_(new ListenerImpl(name, delegate)) {
+}
+
+Listener::~Listener() { }

[Mark Mentovai, 2011/01/04 18:19:33]

Put the } on its own line.

[dmac, 2011/01/06 06:06:03]

Done.

+
+bool Listener::Start() {
+  return impl_->Start();
+}
+
+}  // namespace multi_process_notification