Implement <appview> skeleton.

chrome/browser/extensions/api/guest_view/guest_view_internal_api.cc

 // Copyright 2014 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/browser/extensions/api/guest_view/guest_view_internal_api.h"
 
 #include "chrome/browser/guest_view/guest_view_base.h"
 #include "chrome/browser/guest_view/guest_view_manager.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/extensions/api/guest_view_internal.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "extensions/common/permissions/permissions_data.h"
 
 namespace {
-const char* kWebViewPermissionRequiredError =
-    "\"webview\" permission is required for allocating instance ID.";
+const char* kPermissionRequiredError =
+    "\"webview\" or \"appview\" permission is required for allocating "
+    "instance ID.";
 }  // namespace
 
 namespace extensions {
 
 GuestViewInternalCreateGuestFunction::
     GuestViewInternalCreateGuestFunction() {
 }
 
 bool GuestViewInternalCreateGuestFunction::RunAsync() {
   std::string view_type;
   EXTENSION_FUNCTION_VALIDATE(args_->GetString(0, &view_type));
 
   base::DictionaryValue* create_params;
   EXTENSION_FUNCTION_VALIDATE(args_->GetDictionary(1, &create_params));
 
-  if (!GetExtension()->permissions_data()->HasAPIPermission(
-          APIPermission::kWebView)) {
-    LOG(ERROR) << kWebViewPermissionRequiredError;
-    error_ = kWebViewPermissionRequiredError;
+  const PermissionsData* permissions_data = GetExtension()->permissions_data();
+  if (!permissions_data->HasAPIPermission(APIPermission::kWebView) &&
+      !permissions_data->HasAPIPermission(APIPermission::kAppView)) {
+    LOG(ERROR) << kPermissionRequiredError;
+    error_ = kPermissionRequiredError;
     SendResponse(false);
   }
 
   GuestViewManager* guest_view_manager =
       GuestViewManager::FromBrowserContext(browser_context());
 
   GuestViewManager::WebContentsCreatedCallback callback =
       base::Bind(&GuestViewInternalCreateGuestFunction::CreateGuestCallback,
                  this);
   guest_view_manager->CreateGuest(view_type,
                                   extension_id(),
                                   render_view_host()->GetProcess()->GetID(),
                                   *create_params,
                                   callback);
 
   return true;
 }
 
 void GuestViewInternalCreateGuestFunction::CreateGuestCallback(
     content::WebContents* guest_web_contents) {
   if (!guest_web_contents)
     return;
   GuestViewBase* guest = GuestViewBase::FromWebContents(guest_web_contents);
   SetResult(base::Value::CreateIntegerValue(guest->GetGuestInstanceID()));
   SendResponse(true);
 }
 
 }  // namespace extensions