Add an IPC channel between the NaCl loader process and the renderer.

chrome/common/render_messages.h

 // 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.
 
 // Multiply-included file, no traditional include guard.
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/process.h"
 #include "base/shared_memory.h"
 #include "base/string16.h"
 #include "base/stringprintf.h"
 #include "base/values.h"
 #include "build/build_config.h"
 #include "chrome/common/common_param_traits.h"
 #include "chrome/common/content_settings.h"
 #include "chrome/common/content_settings_pattern.h"
 #include "chrome/common/instant_types.h"
 #include "chrome/common/nacl_types.h"
 #include "chrome/common/search_provider.h"
 #include "chrome/common/thumbnail_score.h"
 #include "chrome/common/translate_errors.h"
 #include "content/public/common/common_param_traits.h"
 #include "content/public/common/webkit_param_traits.h"
+#include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_platform_file.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebCache.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebConsoleMessage.h"
 #include "ui/gfx/rect.h"
 
 // Singly-included section for enums and custom IPC traits.
 #ifndef CHROME_COMMON_RENDER_MESSAGES_H_
 #define CHROME_COMMON_RENDER_MESSAGES_H_
@@ skipping 439 matching lines @@
                     SkBitmap /* bitmap */)
 
 // A message for an external host.
 IPC_MESSAGE_ROUTED3(ChromeViewHostMsg_ForwardMessageToExternalHost,
                     std::string  /* message */,
                     std::string  /* origin */,
                     std::string  /* target */)
 
 // 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_CONTROL2_1(ChromeViewHostMsg_LaunchNaCl,
+// the process and return an IPC channel handle. This handle will only
+// be valid if the NaCl IPC proxy is enabled.
+IPC_SYNC_MESSAGE_CONTROL2_2(ChromeViewHostMsg_LaunchNaCl,
                             GURL /* manifest_url */,
                             int /* socket count */,
                             std::vector<nacl::FileDescriptor>
-                                /* imc channel handles */)
+                                /* imc channel handles */,
+                            IPC::ChannelHandle /* ipc_channel_handle */)
 
 // Notification that the page has an OpenSearch description document
 // associated with it.
 IPC_MESSAGE_ROUTED3(ChromeViewHostMsg_PageHasOSDD,
                     int32 /* page_id */,
                     GURL /* url of OS description document */,
                     search_provider::OSDDType)
 
 // Find out if the given url's security origin is installed as a search
 // provider.
@@ skipping 118 matching lines @@
 // previous SetCookie message to be processed.
 IPC_SYNC_MESSAGE_ROUTED2_1(ChromeViewHostMsg_GetCookies,
                            GURL /* url */,
                            GURL /* first_party_for_cookies */,
                            std::string /* cookies */)
 
 // Provide the browser process with current renderer framerate.
 IPC_MESSAGE_CONTROL2(ChromeViewHostMsg_FPS,
                      int /* routing id */,
                      float /* frames per second */)