Plumb network stack information about existence of cached copy

content/child/resource_dispatcher.cc

 // 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.
 
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #include "content/child/resource_dispatcher.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 503 matching lines @@
     PendingRequestInfo& request_info) {
   IPC::Message* msg = request_info.pending_redirect_message.release();
   if (msg)
     message_sender()->Send(msg);
 }
 
 void ResourceDispatcher::OnRequestComplete(
     int request_id,
     int error_code,
     bool was_ignored_by_handler,
+    bool stale_copy_in_cache,
     const std::string& security_info,
     const base::TimeTicks& browser_completion_time) {
   TRACE_EVENT0("loader", "ResourceDispatcher::OnRequestComplete");
   SiteIsolationPolicy::OnRequestComplete(request_id);
 
   PendingRequestInfo* request_info = GetPendingRequestInfo(request_id);
   if (!request_info)
     return;
   request_info->completion_time = ConsumeIOTimestamp();
   request_info->buffer.reset();
   request_info->buffer_size = 0;
 
   ResourceLoaderBridge::Peer* peer = request_info->peer;
 
   if (delegate_) {
     ResourceLoaderBridge::Peer* new_peer =
         delegate_->OnRequestComplete(
             request_info->peer, request_info->resource_type, error_code);
     if (new_peer)
       request_info->peer = new_peer;
   }
 
   base::TimeTicks renderer_completion_time = ToRendererCompletionTime(
       *request_info, browser_completion_time);
   // The request ID will be removed from our pending list in the destructor.
   // Normally, dispatching this message causes the reference-counted request to
   // die immediately.
-  peer->OnCompletedRequest(error_code, was_ignored_by_handler, security_info,
+  peer->OnCompletedRequest(error_code, was_ignored_by_handler,
+                           stale_copy_in_cache, security_info,
                            renderer_completion_time);
 }
 
 int ResourceDispatcher::AddPendingRequest(
     ResourceLoaderBridge::Peer* callback,
     ResourceType::Type resource_type,
     int origin_pid,
     const GURL& frame_origin,
     const GURL& request_url) {
   // Compute a unique request_id for this renderer process.
@@ skipping 238 matching lines @@
 void ResourceDispatcher::ReleaseResourcesInMessageQueue(MessageQueue* queue) {
   while (!queue->empty()) {
     IPC::Message* message = queue->front();
     ReleaseResourcesInDataMessage(*message);
     queue->pop_front();
     delete message;
   }
 }
 
 }  // namespace content