OOPIF: History navigations for new child frames.

content/common/frame_messages.h

 // Copyright 2013 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 interacting with frames.
 // Multiply-included message file, hence no include guard.
 
 #include "cc/surfaces/surface_id.h"
 #include "cc/surfaces/surface_sequence.h"
 #include "content/common/content_export.h"
@@ skipping 364 matching lines @@
   // properties of the HTMLFrameOwnerElement from the parent process.
   // Note that unlike FrameReplicationState, this is not replicated for remote
   // frames.
   IPC_STRUCT_MEMBER(blink::WebFrameOwnerProperties, frame_owner_properties)
 
   // Specifies properties for a new RenderWidget that will be attached to the
   // new RenderFrame (if one is needed).
   IPC_STRUCT_MEMBER(FrameMsg_NewFrame_WidgetParams, widget_params)
 IPC_STRUCT_END()
 
+// Parameters included with an OpenURL request.  |frame_unique_name| is only
+// specified if |is_history_navigation_in_new_child| is true, for the case that
+// the browser process should look for an existing history item for the frame.
 IPC_STRUCT_BEGIN(FrameHostMsg_OpenURL_Params)
   IPC_STRUCT_MEMBER(GURL, url)
   IPC_STRUCT_MEMBER(content::Referrer, referrer)
   IPC_STRUCT_MEMBER(WindowOpenDisposition, disposition)
   IPC_STRUCT_MEMBER(bool, should_replace_current_entry)
   IPC_STRUCT_MEMBER(bool, user_gesture)
+  IPC_STRUCT_MEMBER(bool, is_history_navigation_in_new_child)
+  IPC_STRUCT_MEMBER(std::string, frame_unique_name)
 IPC_STRUCT_END()
 
 IPC_STRUCT_BEGIN(FrameMsg_TextTrackSettings_Params)
   // Text tracks on/off state
   IPC_STRUCT_MEMBER(bool, text_tracks_enabled)
 
   // Background color of the text track.
   IPC_STRUCT_MEMBER(std::string, text_track_background_color)
 
   // Font family of the text track text.
@@ skipping 850 matching lines @@
 IPC_MESSAGE_ROUTED1(FrameHostMsg_ShowPopup,
                     FrameHostMsg_ShowPopup_Params)
 IPC_MESSAGE_ROUTED0(FrameHostMsg_HidePopup)
 
 #endif
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent FrameMsg, then ifdefs for platform specific FrameMsg, then
 // platform independent FrameHostMsg, then ifdefs for platform specific
 // FrameHostMsg.