Update a bunch of files to the new location of notification files.

chrome/common/chrome_plugin_util.h

Index: chrome/common/chrome_plugin_util.h
diff --git a/chrome/common/chrome_plugin_util.h b/chrome/common/chrome_plugin_util.h
index 9769a7676fc68251e6ea566cd3ed71721f664143..17fdbe546afa6b4b11c2eba9279e2e9d9486331b 100644
--- a/chrome/common/chrome_plugin_util.h
+++ b/chrome/common/chrome_plugin_util.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -12,8 +12,8 @@
 #include "base/ref_counted.h"
 #include "base/threading/non_thread_safe.h"
 #include "chrome/common/chrome_plugin_api.h"
-#include "chrome/common/notification_observer.h"
-#include "chrome/common/notification_registrar.h"
+#include "content/common/notification_observer.h"
+#include "content/common/notification_registrar.h"
 
 class ChromePluginLib;
 class MessageLoop;