Add "frame to navigate" to NavigationEntry and plumb it to the RenderViewImpl

content/common/view_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.
 
 // IPC messages for page rendering.
 // Multiply-included message file, hence no include guard.
 
 #include "base/process.h"
 #include "base/shared_memory.h"
 #include "base/string16.h"
@@ skipping 626 matching lines @@
   // True if this was a post request.
   IPC_STRUCT_MEMBER(bool, is_post)
 
   // If is_post is true, holds the post_data information from browser. Empty
   // otherwise.
   IPC_STRUCT_MEMBER(std::vector<unsigned char>, browser_initiated_post_data)
 
   // Whether or not this url should be allowed to access local file://
   // resources.
   IPC_STRUCT_MEMBER(bool, can_load_local_resources)
+
+  // If not empty, which frame to navigate.
+  IPC_STRUCT_MEMBER(std::string, frame_to_navigate)
 IPC_STRUCT_END()
 
 // Parameters for an OpenURL request.
 IPC_STRUCT_BEGIN(ViewHostMsg_OpenURL_Params)
   IPC_STRUCT_MEMBER(GURL, url)
   IPC_STRUCT_MEMBER(content::Referrer, referrer)
   IPC_STRUCT_MEMBER(WindowOpenDisposition, disposition)
   IPC_STRUCT_MEMBER(int64, frame_id)
   IPC_STRUCT_MEMBER(bool, is_cross_site_redirect)
 IPC_STRUCT_END()
@@ skipping 1718 matching lines @@
 // cached by the OS. Please see RenderMessageFilter::OnPreCacheFontCharacters
 // for details.
 IPC_SYNC_MESSAGE_CONTROL2_0(ViewHostMsg_PreCacheFontCharacters,
                             LOGFONT /* font_data */,
                             string16 /* characters */)
 #endif
 
 // Notifies the browser that the frame with the given id was detached.
 IPC_MESSAGE_ROUTED1(ViewHostMsg_FrameDetached,
                     int64 /* frame_id */)