Remove magic iframe load transfer support.

content/browser/renderer_host/resource_dispatcher_host_impl.cc

Index: content/browser/renderer_host/resource_dispatcher_host_impl.cc
diff --git a/content/browser/renderer_host/resource_dispatcher_host_impl.cc b/content/browser/renderer_host/resource_dispatcher_host_impl.cc
index a44e4433ca9784a53ae673dfc21f0ddd884cf3a1..51a16a63b8ff057de7475c0466b15ef96c4a69ad 100644
--- a/content/browser/renderer_host/resource_dispatcher_host_impl.cc
+++ b/content/browser/renderer_host/resource_dispatcher_host_impl.cc
@@ -673,8 +673,6 @@ bool ResourceDispatcherHostImpl::OnMessageReceived(
     IPC_MESSAGE_HANDLER(ResourceHostMsg_DataDownloaded_ACK, OnDataDownloadedACK)
     IPC_MESSAGE_HANDLER(ResourceHostMsg_UploadProgress_ACK, OnUploadProgressACK)
     IPC_MESSAGE_HANDLER(ResourceHostMsg_CancelRequest, OnCancelRequest)
-    IPC_MESSAGE_HANDLER(ResourceHostMsg_TransferRequestToNewPage,
-                        OnTransferRequestToNewPage)
     IPC_MESSAGE_HANDLER(ResourceHostMsg_FollowRedirect, OnFollowRedirect)
     IPC_MESSAGE_HANDLER(ViewHostMsg_SwapOut_ACK, OnSwapOutACK)
     IPC_MESSAGE_HANDLER(ViewHostMsg_DidLoadResourceFromMemoryCache,
@@ -1049,24 +1047,6 @@ void ResourceDispatcherHostImpl::OnCancelRequest(int request_id) {
   CancelRequest(filter_->child_id(), request_id, true);
 }
 
-// Assigns the pending request a new routing_id because it was transferred
-// to a new page.
-void ResourceDispatcherHostImpl::OnTransferRequestToNewPage(int new_routing_id,
-                                                            int request_id) {
-  PendingRequestList::iterator i = pending_requests_.find(
-      GlobalRequestID(filter_->child_id(), request_id));
-  if (i == pending_requests_.end()) {
-    // We probably want to remove this warning eventually, but I wanted to be
-    // able to notice when this happens during initial development since it
-    // should be rare and may indicate a bug.
-    DVLOG(1) << "Updating a request that wasn't found";
-    return;
-  }
-  net::URLRequest* request = i->second;
-  ResourceRequestInfoImpl* info = ResourceRequestInfoImpl::ForRequest(request);
-  info->set_route_id(new_routing_id);
-}
-
 void ResourceDispatcherHostImpl::OnFollowRedirect(
     int request_id,
     bool has_new_first_party_for_cookies,