Preparing rollback in case things don't work out....

chrome/common/render_messages_internal.h

 // Copyright (c) 2009 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.
 
 // This header is meant to be included in multiple passes, hence no traditional
 // header guard.
 // See ipc_message_macros.h for explanation of the macros and passes.
 
 #include <string>
 #include <vector>
 
 #include "build/build_config.h"
 
 #include "base/clipboard.h"
 #include "base/file_path.h"
 #include "base/nullable_string16.h"
 #include "base/platform_file.h"
 #include "base/gfx/rect.h"
 #include "base/gfx/native_widget_types.h"
 #include "base/shared_memory.h"
 #include "base/values.h"
 #include "chrome/common/css_colors.h"
 #include "chrome/common/extensions/update_manifest.h"
-#include "chrome/common/nacl_types.h"
 #include "chrome/common/transport_dib.h"
 #include "chrome/common/view_types.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_message_macros.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "webkit/appcache/appcache_interfaces.h"
 #include "webkit/glue/dom_operations.h"
 #include "webkit/glue/webcursor.h"
 #include "webkit/glue/webplugin.h"
 
@@ skipping 1024 matching lines @@
   // create a plugin.  The browser will create the plugin process if
   // necessary, and will return a handle to the channel on success.
   // On error an empty string is returned.
   IPC_SYNC_MESSAGE_CONTROL3_2(ViewHostMsg_OpenChannelToPlugin,
                               GURL /* url */,
                               std::string /* mime_type */,
                               std::wstring /* locale */,
                               IPC::ChannelHandle /* handle to channel */,
                               WebPluginInfo /* info */)
 
-  // A renderer sends this to the browser process when it wants to start
-  // a new instance of the Native Client process. The browser will launch
-  // the process and return a handle to an IMC channel.
-  IPC_SYNC_MESSAGE_CONTROL1_1(ViewHostMsg_LaunchNaCl,
-                              int /* channel number, usually 5 */,
-                              nacl::FileDescriptor /* handle - one side
-                                                      of a socket pair */)
-
 #if defined(OS_LINUX)
   // A renderer sends this when it needs a browser-side widget for
   // hosting a windowed plugin. id is the XID of the plugin window, for which
   // the container is created.
   IPC_SYNC_MESSAGE_ROUTED1_0(ViewHostMsg_CreatePluginContainer,
                              gfx::PluginWindowHandle /* id */)
 
   // Destroy a plugin container previously created using CreatePluginContainer.
   // id is the XID of the plugin window corresponding to the container that is
   // to be destroyed.
@@ skipping 657 matching lines @@
   IPC_MESSAGE_CONTROL2(ViewHostMsg_DatabaseGetFileAttributes,
                        FilePath /* the name of the file */,
                        int32 /* a unique message ID */)
 
   // Asks the browser process to return the size of a DB file
   IPC_MESSAGE_CONTROL2(ViewHostMsg_DatabaseGetFileSize,
                        FilePath /* the name of the file */,
                        int32 /* a unique message ID */)
 
 IPC_END_MESSAGES(ViewHost)