Terminate plugin processes on a delayed task to allow the plugins to shutdown gracefully, i.e. NP...

content/plugin/plugin_channel.cc

Index: content/plugin/plugin_channel.cc
===================================================================
--- content/plugin/plugin_channel.cc	(revision 86295)
+++ content/plugin/plugin_channel.cc	(working copy)
@@ -32,9 +32,19 @@
   }
 };
 
+class PluginProcessExitTask : public Task {
+ public:
+  void Run() {
+    base::KillProcess(base::GetCurrentProcessHandle(), 0, false);
+  }
+};
+
 // How long we wait before releasing the plugin process.
 const int kPluginReleaseTimeMs = 5 * 60 * 1000;  // 5 minutes
 
+// How long we wait before forcibly shutting down the process.
+const int kPluginProcessTerminateTimeoutMs = 3000;
+
 }  // namespace
 
 // If a sync call to the renderer results in a modal dialog, we need to have a
@@ -88,6 +98,15 @@
  private:
   void OnFilterAdded(IPC::Channel* channel) { channel_ = channel; }
 
+  virtual void OnChannelError() {
+    // Ensure that we don't wait indefinitely for the plugin to shutdown.
+    // as the browser does not terminate plugin processes on shutdown.
+    // We achieve this by posting an exit process task on the IO thread.
+    MessageLoop::current()->PostDelayedTask(FROM_HERE,
+                                            new PluginProcessExitTask(),
+                                            kPluginProcessTerminateTimeoutMs);
+  }
+
   bool OnMessageReceived(const IPC::Message& message) {
     IPC_BEGIN_MESSAGE_MAP(PluginChannel::MessageFilter, message)
       IPC_MESSAGE_HANDLER_DELAY_REPLY(PluginMsg_Init, OnInit)