Implement basic crash detection and shutdown handling for out of process PPAP...

chrome/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 "chrome/ppapi_plugin/plugin_process_dispatcher.h"
+
+#include "chrome/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)
+    : pp::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);
+}