Convert MimeRegistry to use mojo.

content/browser/mime_registry_message_filter.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 "content/browser/mime_registry_message_filter.h"
-
-#include "content/common/mime_registry_messages.h"
-#include "net/base/mime_util.h"
-
-namespace content {
-
-MimeRegistryMessageFilter::MimeRegistryMessageFilter()
-    : BrowserMessageFilter(MimeRegistryMsgStart) {
-}
-
-MimeRegistryMessageFilter::~MimeRegistryMessageFilter() {
-}
-
-void MimeRegistryMessageFilter::OverrideThreadForMessage(
-    const IPC::Message& message,
-    BrowserThread::ID* thread) {
-  if (IPC_MESSAGE_CLASS(message) == MimeRegistryMsgStart)
-    *thread = BrowserThread::FILE;
-}
-
-bool MimeRegistryMessageFilter::OnMessageReceived(const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(MimeRegistryMessageFilter, message)
-    IPC_MESSAGE_HANDLER(MimeRegistryMsg_GetMimeTypeFromExtension,
-                        OnGetMimeTypeFromExtension)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
-void MimeRegistryMessageFilter::OnGetMimeTypeFromExtension(
-    const base::FilePath::StringType& ext, std::string* mime_type) {
-  net::GetMimeTypeFromExtension(ext, mime_type);
-}
-
-}  // namespace content