This CL makes the TranslationService class send the text to be translated to ...

chrome/common/render_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.
 
 // 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 <map>
 #include <string>
@@ skipping 822 matching lines @@
                        std::string /* word */)
 
   // Toggle the auto spell correct functionality.
   IPC_MESSAGE_CONTROL1(ViewMsg_SpellChecker_EnableAutoSpellCorrect,
                        bool /* enable */)
 
   // Executes custom context menu action that was provided from WebKit.
   IPC_MESSAGE_ROUTED1(ViewMsg_CustomContextMenuAction,
                       unsigned /* action */)
 
+  // Tells the renderer to translate the page contents from one language to
+  // another.
+  IPC_MESSAGE_ROUTED3(ViewMsg_TranslatePage,
+                      int /* page id */,
+                      std::string, /* BCP 47/RFC 5646 language code the page
+                                      is in */
+                      std::string /* BCP 47/RFC 5646 language code to translate
+                                     to */)
+
   // Reply to the ViewHostMsg_TranslateText message with the actual translated
   // text chunks.
   IPC_MESSAGE_ROUTED3(ViewMsg_TranslateTextReponse,
                       int /* id of translation work */,
                       int /* error id of translation work */,
                       std::vector<string16> /* the translated text chunks */)
 
 IPC_END_MESSAGES(View)
 
 
@@ skipping 1166 matching lines @@
       ViewHostMsg_SpellChecker_PlatformFillSuggestionList,
       string16 /* word */,
       std::vector<string16> /* suggestions */)
 
   // Request for text translation.
   // Used when translating a page from one language to another.
   IPC_MESSAGE_CONTROL1(ViewHostMsg_TranslateText,
                        ViewHostMsg_TranslateTextParam)
 
 IPC_END_MESSAGES(ViewHost)