Navigation transitions: Block first response until after transitions have run.

content/browser/frame_host/render_frame_host_manager.cc

 // 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.
 
 #include "content/browser/frame_host/render_frame_host_manager.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 330 matching lines @@
   pending_nav_params_.reset(new PendingNavigationParams(
       global_request_id, cross_site_transferring_request.Pass(),
       transfer_url_chain, referrer, page_transition,
       pending_render_frame_host->GetRoutingID(),
       should_replace_current_entry));
 
   // Run the unload handler of the current page.
   SwapOutOldPage();
 }
 
+void RenderFrameHostManager::OnDeferredAfterResponseStarted(
+    const GlobalRequestID& global_request_id,
+    RenderFrameHostImpl* pending_render_frame_host) {
+  DCHECK(!response_started_id_.get());
+
+  response_started_id_.reset(new GlobalRequestID(global_request_id));
+}
+
+void RenderFrameHostManager::ResumeResponseDeferredAtStart() {
+  DCHECK(response_started_id_.get());
+
+  RenderProcessHostImpl* process =
+      static_cast<RenderProcessHostImpl*>(render_frame_host_->GetProcess());
+  process->ResumeResponseDeferredAtStart(*response_started_id_);
+
+  render_frame_host_->SetHasPendingTransitionRequest(false);
+
+  response_started_id_.reset();
+}
+
 void RenderFrameHostManager::SwappedOut(
     RenderFrameHostImpl* render_frame_host) {
   // Make sure this is from our current RFH, and that we have a pending
   // navigation from OnCrossSiteResponse.  (There may be no pending navigation
   // for data URLs that don't make network requests, for example.)   If not,
   // just return early and ignore.
   if (render_frame_host != render_frame_host_ || !pending_nav_params_.get()) {
     pending_nav_params_.reset();
     return;
   }
@@ skipping 1109 matching lines @@
     SiteInstance* instance) const {
   RenderFrameProxyHostMap::const_iterator iter =
       proxy_hosts_.find(instance->GetId());
   if (iter != proxy_hosts_.end())
     return iter->second;
 
   return NULL;
 }
 
 }  // namespace content