Implement the file chooser as a new resource "host"

content/renderer/pepper/pepper_instance_state_accessor_impl.cc

+// Copyright (c) 2012 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/renderer/pepper/pepper_instance_state_accessor_impl.h"
+
+#include "ppapi/shared_impl/ppapi_permissions.h"
+#include "webkit/plugins/ppapi/host_globals.h"
+#include "webkit/plugins/ppapi/plugin_module.h"
+#include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
+
+using webkit::ppapi::HostGlobals;
+using webkit::ppapi::PluginInstance;
+
+namespace content {
+
+PepperInstanceStateAccessorImpl::PepperInstanceStateAccessorImpl(
+    webkit::ppapi::PluginModule* module)
+    : module_(module) {
+}
+
+PepperInstanceStateAccessorImpl::~PepperInstanceStateAccessorImpl() {
+}
+
+bool PepperInstanceStateAccessorImpl::IsValidInstance(PP_Instance instance) {
+  return !!GetAndValidateInstance(instance);
+}
+
+bool PepperInstanceStateAccessorImpl::HasUserGesture(PP_Instance pp_instance) {
+  PluginInstance* instance = GetAndValidateInstance(pp_instance);
+  if (!instance)
+    return false;
+
+  if (instance->module()->permissions().HasPermission(
+          ppapi::PERMISSION_BYPASS_USER_GESTURE))
+    return true;
+  return instance->IsProcessingUserGesture();
+}
+
+PluginInstance* PepperInstanceStateAccessorImpl::GetAndValidateInstance(
+    PP_Instance pp_instance) {
+  PluginInstance* instance = HostGlobals::Get()->GetInstance(pp_instance);
+  if (!instance)
+    return NULL;
+  if (instance->module() != module_)
+    return NULL;
+  return instance;
+}
+
+}  // namespace content