Remove custom Task implementations from content/ppapi_plugin

content/ppapi_plugin/plugin_process_dispatcher.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 "content/ppapi_plugin/plugin_process_dispatcher.h"
 
+#include "base/bind.h"
+#include "base/bind_helpers.h"
 #include "content/common/child_process.h"
 
 namespace {
 
-class PluginReleaseTask : public Task {
- public:
-  void Run() {
-    ChildProcess::current()->ReleaseProcess();
-  }
-};
-
 // How long we wait before releasing the plugin process.
 const int kPluginReleaseTimeMs = 30 * 1000;  // 30 seconds.
 
 }  // namespace
 
 PluginProcessDispatcher::PluginProcessDispatcher(
     base::ProcessHandle remote_process_handle,
     GetInterfaceFunc get_interface)
     : ppapi::proxy::PluginDispatcher(remote_process_handle, get_interface) {
   ChildProcess::current()->AddRefProcess();
 }
 
 PluginProcessDispatcher::~PluginProcessDispatcher() {
   // Don't free the process right away. This timer allows the child process
   // to be re-used if the user rapidly goes to a new page that requires this
   // plugin. This is the case for common plugins where they may be used on a
   // source and destination page of a navigation. We don't want to tear down
   // and re-start processes each time in these cases.
-  MessageLoop::current()->PostDelayedTask(FROM_HERE, new PluginReleaseTask(),
-                                          kPluginReleaseTimeMs);
+  MessageLoop::current()->PostDelayedTask(
+      FROM_HERE,
+      base::Bind(&ChildProcess::ReleaseProcess,
+                 base::Unretained(ChildProcess::current())),
+      kPluginReleaseTimeMs);
 }