OOPIF: History navigations for new child frames.

content/common/frame_messages.h

Index: content/common/frame_messages.h
diff --git a/content/common/frame_messages.h b/content/common/frame_messages.h
index a2766fd2f8b50d5f0cd0b10c3260f7348a53feaf..a0743134ddfee810b8d9d63c14bf96b1a192125d 100644
--- a/content/common/frame_messages.h
+++ b/content/common/frame_messages.h
@@ -797,6 +797,11 @@ IPC_MESSAGE_ROUTED0(FrameHostMsg_DidStopLoading)
 // Notifies the browser that this frame has new session history information.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_UpdateState, content::PageState /* state */)
 
+// Tells the browser to navigate this newly created child frame to the session
+// history item corresponding to it, based on the frame's unique name.
+IPC_MESSAGE_ROUTED1(FrameHostMsg_NavigateNewChildFrame,
+                    std::string /* unique_name */)
+
 // Sent when the frame changes its window.name.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_DidChangeName, std::string /* name */)