Move NotificationObserver, NotificationSource, and NotificationDetails to content/public/browser.

This patch got way bigger than I wanted, but once I moved NotificationDetails, I figured I might as well mvoe the others since they're in the same files. In hindsight, I should have converted a subset of files at a time by leaving a using statement in the header.

BUG=98716
TBR=joi

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@106196 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 30 insertions, 0 deletions

diff --git a/content/public/browser/notification_observer.h b/content/public/browser/notification_observer.h
new file mode 100644
index 0000000..9bcf9c5
--- /dev/null
+++ b/content/public/browser/notification_observer.h
@@ -0,0 +1,30 @@
+// 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.
+
+#ifndef CONTENT_PUBLIC_BROWSER_NOTIFICATION_OBSERVER_H_
+#define CONTENT_PUBLIC_BROWSER_NOTIFICATION_OBSERVER_H_
+#pragma once
+
+#include "content/common/content_export.h"
+
+namespace content {
+
+class NotificationDetails;
+class NotificationSource;
+
+// This is the base class for notification observers. When a matching
+// notification is posted to the notification service, Observe is called.
+class CONTENT_EXPORT NotificationObserver {
+ public:
+  NotificationObserver() {}
+  virtual ~NotificationObserver() {}
+
+  virtual void Observe(int type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details) = 0;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_NOTIFICATION_OBSERVER_H_