Implementation of shared worker code path for WebView file system permission.

chrome/browser/guest_view/web_view/web_view_guest.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/guest_view/web_view/web_view_guest.h"
 
 #include "base/message_loop/message_loop.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ skipping 910 matching lines @@
   render_frame_host->Send(
       new ChromeViewMsg_RequestFileSystemAccessAsyncResponse(
           render_frame_id, request_id, allowed));
 }
 
 // static
 void WebViewGuest::FileSystemAccessedSync(int render_process_id,
                                           int render_frame_id,
                                           const GURL& url,
                                           bool blocked_by_policy,
-                                          IPC::Message* reply_msg) {
+                                          base::Callback<void(bool)> callback) {
   WebViewGuest* guest =
       WebViewGuest::FromFrameID(render_process_id, render_frame_id);
   DCHECK(guest);
   guest->RequestFileSystemPermission(
       url,
       !blocked_by_policy,
       base::Bind(&WebViewGuest::FileSystemAccessedSyncResponse,
                  render_process_id,
                  render_frame_id,
                  url,
-                 reply_msg));
+                 callback));
 }
 
 // static
-void WebViewGuest::FileSystemAccessedSyncResponse(int render_process_id,
-                                                  int render_frame_id,
-                                                  const GURL& url,
-                                                  IPC::Message* reply_msg,
-                                                  bool allowed) {
+void WebViewGuest::FileSystemAccessedSyncResponse(
+    int render_process_id,
+    int render_frame_id,
+    const GURL& url,
+    base::Callback<void(bool)> callback,
+    bool allowed) {
   TabSpecificContentSettings::FileSystemAccessed(
       render_process_id, render_frame_id, url, !allowed);
-  ChromeViewHostMsg_RequestFileSystemAccessSync::WriteReplyParams(reply_msg,
-                                                                  allowed);
-  content::RenderFrameHost* render_frame_host =
-      content::RenderFrameHost::FromID(render_process_id, render_frame_id);
-  if (!render_frame_id)
-    return;
-  render_frame_host->Send(reply_msg);
+  callback.Run(allowed);
 }
 
 WebViewGuest::~WebViewGuest() {
 }
 
 void WebViewGuest::DidCommitProvisionalLoadForFrame(
     int64 frame_id,
     const base::string16& frame_unique_name,
     bool is_main_frame,
     const GURL& url,
@@ skipping 621 matching lines @@
     bool allow,
     const std::string& user_input) {
   WebViewGuest* guest =
       WebViewGuest::From(embedder_render_process_id(), new_window_instance_id);
   if (!guest)
     return;
 
   if (!allow)
     guest->Destroy();
 }