Keep the module in scope when executing scripts. This prevents a crash when the

ppapi/tests/manual/delete_plugin.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 "ppapi/c/pp_errors.h"
+#include "ppapi/c/pp_input_event.h"
+#include "ppapi/c/ppb_var.h"
+#include "ppapi/c/trusted/ppb_instance_trusted.h"
+#include "ppapi/cpp/completion_callback.h"
+#include "ppapi/cpp/instance.h"
+#include "ppapi/cpp/module.h"
+#include "ppapi/cpp/private/var_private.h"
+
+class MyInstance : public pp::Instance {
+ public:
+  MyInstance(PP_Instance instance) : pp::Instance(instance) {
+    factory_.Initialize(this);
+  }
+
+  virtual ~MyInstance() {
+  }
+
+  virtual bool Init(uint32_t argc, const char* argn[], const char* argv[]) {
+    return true;
+  }
+
+  virtual bool HandleInputEvent(const PP_InputEvent& event) {
+    switch (event.type) {
+      case PP_INPUTEVENT_TYPE_MOUSEDOWN:
+        pp::Module::Get()->core()->CallOnMainThread(100,
+            factory_.NewCallback(&MyInstance::SayHello));
+        return true;
+      case PP_INPUTEVENT_TYPE_MOUSEMOVE:
+        return true;
+      case PP_INPUTEVENT_TYPE_KEYDOWN:
+        return true;
+      default:
+        return false;
+    }
+  }
+
+ private:
+  void SayHello(int32_t) {
+    pp::Var code("deletePlugin()");
+    /*

[viettrungluu, 2011/04/18 19:53:41]

Could you add a comment on why it's commented out?

+    const PPB_Instance_Trusted* inst =
+        (const PPB_Instance_Trusted*)pp::Module::Get()->GetBrowserInterface(
+            PPB_INSTANCE_TRUSTED_INTERFACE);
+    inst->ExecuteScript(pp_instance(), code.pp_var(), NULL);
+    */
+    ExecuteScript(code);
+  }
+
+  pp::CompletionCallbackFactory<MyInstance> factory_;
+};
+
+class MyModule : public pp::Module {
+ public:
+  MyModule() : pp::Module() {}
+  virtual ~MyModule() {}
+
+  virtual pp::Instance* CreateInstance(PP_Instance instance) {
+    return new MyInstance(instance);
+  }
+};
+
+namespace pp {
+
+// Factory function for your specialization of the Module object.
+Module* CreateModule() {
+  return new MyModule();
+}
+
+}  // namespace pp