Add multi-process notification class.

chrome/browser/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/browser/multi_process_notification.h"
+
+#include "base/logging.h"
+
+namespace multi_process_notification {
+
+bool Post(const std::string& name, Domain domain) {
+  // TODO(dmaclach): Implement
+  NOTIMPLEMENTED();
+  return false;
+}
+
+class ListenerImpl {
+ public:
+  ListenerImpl(const std::string& name,
+               Domain domain,
+               Listener::Delegate* delegate);
+
+  bool Start();
+
+ private:
+  std::string name_;
+  Domain domain_;
+  Listener::Delegate* delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(ListenerImpl);
+};
+
+ListenerImpl::ListenerImpl(const std::string& name,
+                           Domain domain,
+                           Listener::Delegate* delegate)
+    : name_(name), domain_(domain), delegate_(delegate) {
+}
+
+bool ListenerImpl::Start() {
+  // TODO(dmaclach): Implement
+  NOTIMPLEMENTED();
+  return false;
+}
+
+Listener::Listener(const std::string& name,
+                   Domain domain,
+                   Listener::Delegate* delegate)
+    : impl_(new ListenerImpl(name, domain, delegate)) {
+}
+
+Listener::~Listener() {
+}
+
+bool Listener::Start() {
+  return impl_->Start();
+}
+
+}  // namespace multi_process_notification