Simplify the magic required to create IPC message headers a bit.

chrome/browser/importer/importer_messages_internal.h

 // Copyright (c) 2010 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 <string>
 #include <vector>
 
 #include "chrome/browser/history/history_types.h"
 #include "chrome/browser/importer/importer_data_types.h"
 #include "ipc/ipc_message_macros.h"
 #include "webkit/glue/password_form.h"
 
+#define IPC_MESSAGE_START ProfileImportMsgStart
+
 //-----------------------------------------------------------------------------
 // ProfileImportProcess messages
 // These are messages sent from the browser to the profile import process.
-IPC_BEGIN_MESSAGES(ProfileImportProcess)
-  IPC_MESSAGE_CONTROL4(ProfileImportProcessMsg_StartImport,
-                       importer::ProfileInfo /* ProfileInfo struct */,
-                       int  /* bitmask of items to import */,
-                       DictionaryValue  /* localized strings */,
-                       bool  /* import to bookmark bar */)
+IPC_MESSAGE_CONTROL4(ProfileImportProcessMsg_StartImport,
+                     importer::ProfileInfo /* ProfileInfo struct */,
+                     int  /* bitmask of items to import */,
+                     DictionaryValue  /* localized strings */,
+                     bool  /* import to bookmark bar */)
 
-  IPC_MESSAGE_CONTROL0(ProfileImportProcessMsg_CancelImport)
+IPC_MESSAGE_CONTROL0(ProfileImportProcessMsg_CancelImport)
 
-  IPC_MESSAGE_CONTROL1(ProfileImportProcessMsg_ReportImportItemFinished,
-                       int  /* ImportItem */)
-IPC_END_MESSAGES(ProfileImportProcess)
+IPC_MESSAGE_CONTROL1(ProfileImportProcessMsg_ReportImportItemFinished,
+                     int  /* ImportItem */)
 
 //---------------------------------------------------------------------------
 // ProfileImportProcessHost messages
 // These are messages sent from the profile import process to the browser.
-IPC_BEGIN_MESSAGES(ProfileImportProcessHost)
-  // These messages send information about the status of the import and
-  // individual import tasks.
-  IPC_MESSAGE_CONTROL0(ProfileImportProcessHostMsg_Import_Started)
+// These messages send information about the status of the import and
+// individual import tasks.
+IPC_MESSAGE_CONTROL0(ProfileImportProcessHostMsg_Import_Started)
 
-  IPC_MESSAGE_CONTROL2(ProfileImportProcessHostMsg_Import_Finished,
-                       bool  /* was import successful? */,
-                       std::string  /* error message, if any */)
+IPC_MESSAGE_CONTROL2(ProfileImportProcessHostMsg_Import_Finished,
+                     bool  /* was import successful? */,
+                     std::string  /* error message, if any */)
 
-  IPC_MESSAGE_CONTROL1(ProfileImportProcessHostMsg_ImportItem_Started,
-                       int  /* ImportItem */)
+IPC_MESSAGE_CONTROL1(ProfileImportProcessHostMsg_ImportItem_Started,
+                     int  /* ImportItem */)
 
-  IPC_MESSAGE_CONTROL1(ProfileImportProcessHostMsg_ImportItem_Finished,
-                       int  /* ImportItem */)
+IPC_MESSAGE_CONTROL1(ProfileImportProcessHostMsg_ImportItem_Finished,
+                     int  /* ImportItem */)
 
-  // These messages send data from the external importer process back to
-  // the process host so it can be written to the profile.
-  IPC_MESSAGE_CONTROL1(ProfileImportProcessHostMsg_NotifyHistoryImportStart,
-                       int  /* total number of history::URLRow items */)
+// These messages send data from the external importer process back to
+// the process host so it can be written to the profile.
+IPC_MESSAGE_CONTROL1(ProfileImportProcessHostMsg_NotifyHistoryImportStart,
+                     int  /* total number of history::URLRow items */)
 
-  IPC_MESSAGE_CONTROL2(ProfileImportProcessHostMsg_NotifyHistoryImportGroup,
-                       std::vector<history::URLRow>,
-                       int  /* the source of URLs as in history::VisitSource.*/
-                            /* To simplify IPC call, pass as an integer */)
+IPC_MESSAGE_CONTROL2(ProfileImportProcessHostMsg_NotifyHistoryImportGroup,
+                     std::vector<history::URLRow>,
+                     int  /* the source of URLs as in history::VisitSource.*/
+                          /* To simplify IPC call, pass as an integer */)
 
-  IPC_MESSAGE_CONTROL1(ProfileImportProcessHostMsg_NotifyHomePageImportReady,
-                       GURL  /* GURL of home page */)
+IPC_MESSAGE_CONTROL1(ProfileImportProcessHostMsg_NotifyHomePageImportReady,
+                     GURL  /* GURL of home page */)
 
-  IPC_MESSAGE_CONTROL3(ProfileImportProcessHostMsg_NotifyBookmarksImportStart,
-                       std::wstring  /* first folder name */,
-                       int  /* options */,
-                       int  /* total number of bookmarks */)
+IPC_MESSAGE_CONTROL3(ProfileImportProcessHostMsg_NotifyBookmarksImportStart,
+                     std::wstring  /* first folder name */,
+                     int  /* options */,
+                     int  /* total number of bookmarks */)
 
-  IPC_MESSAGE_CONTROL1(ProfileImportProcessHostMsg_NotifyBookmarksImportGroup,
-                       std::vector<ProfileWriter::BookmarkEntry>)
+IPC_MESSAGE_CONTROL1(ProfileImportProcessHostMsg_NotifyBookmarksImportGroup,
+                     std::vector<ProfileWriter::BookmarkEntry>)
 
-  IPC_MESSAGE_CONTROL1(ProfileImportProcessHostMsg_NotifyFavIconsImportStart,
-                       int  /* total number of FavIcons */)
+IPC_MESSAGE_CONTROL1(ProfileImportProcessHostMsg_NotifyFavIconsImportStart,
+                     int  /* total number of FavIcons */)
 
-  IPC_MESSAGE_CONTROL1(ProfileImportProcessHostMsg_NotifyFavIconsImportGroup,
-                       std::vector<history::ImportedFavIconUsage> )
+IPC_MESSAGE_CONTROL1(ProfileImportProcessHostMsg_NotifyFavIconsImportGroup,
+                     std::vector<history::ImportedFavIconUsage> )
 
-  IPC_MESSAGE_CONTROL1(ProfileImportProcessHostMsg_NotifyPasswordFormReady,
-                       webkit_glue::PasswordForm )
+IPC_MESSAGE_CONTROL1(ProfileImportProcessHostMsg_NotifyPasswordFormReady,
+                     webkit_glue::PasswordForm )
 
-  IPC_MESSAGE_CONTROL3(ProfileImportProcessHostMsg_NotifyKeywordsReady,
-                       std::vector<TemplateURL>,
-                       int,  /* default keyword index */
-                       bool  /* unique on host and path */)
-IPC_END_MESSAGES(ProfileImportProcessHost)
-
+IPC_MESSAGE_CONTROL3(ProfileImportProcessHostMsg_NotifyKeywordsReady,
+                     std::vector<TemplateURL>,
+                     int,  /* default keyword index */
+                     bool  /* unique on host and path */)