Allows prefetch requests to live beyond the renderer by delaying

content/browser/loader/resource_request_info_impl.h

 // 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.
 
 #ifndef CONTENT_BROWSER_LOADER_RESOURCE_REQUEST_INFO_IMPL_H_
 #define CONTENT_BROWSER_LOADER_RESOURCE_REQUEST_INFO_IMPL_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 33 matching lines @@
       int origin_pid,
       int request_id,
       bool is_main_frame,
       int64 frame_id,
       bool parent_is_main_frame,
       int64 parent_frame_id,
       ResourceType::Type resource_type,
       PageTransition transition_type,
       bool is_download,
       bool is_stream,
+      bool is_detachable,
       bool allow_download,
       bool has_user_gesture,
       WebKit::WebReferrerPolicy referrer_policy,
       ResourceContext* context,
       base::WeakPtr<ResourceMessageFilter> filter,
       bool is_async);
   virtual ~ResourceRequestInfoImpl();
 
   // ResourceRequestInfo implementation:
   virtual ResourceContext* GetContext() const OVERRIDE;
@@ skipping 52 matching lines @@
   bool allow_download() const { return allow_download_; }
 
   // Whether this is a download.
   bool is_download() const { return is_download_; }
   void set_is_download(bool download) { is_download_ = download; }
 
   // Whether this is a stream.
   bool is_stream() const { return is_stream_; }
   void set_is_stream(bool stream) { is_stream_ = stream; }
 
+  // Whether this is a detachable resource. Detachable resource requests can
+  // live beyond the life of the renderer.

[asanka, 2013/10/14 21:06:49]

Nit: In practice this flag means the request is already detached and not just
whether the request can be detached. I'd go with is_detached().

+  bool is_detachable() const { return is_detachable_; }
+  void set_is_detachable(bool is_detachable) { is_detachable_ = is_detachable; }
+
   void set_was_ignored_by_handler(bool value) {
     was_ignored_by_handler_ = value;
   }
 
   // The approximate in-memory size (bytes) that we credited this request
   // as consuming in |outstanding_requests_memory_cost_map_|.
   int memory_cost() const { return memory_cost_; }
   void set_memory_cost(int cost) { memory_cost_ = cost; }
 
  private:
   // Non-owning, may be NULL.
   CrossSiteResourceHandler* cross_site_handler_;
 
   int process_type_;
   int child_id_;
   int route_id_;
   int origin_pid_;
   int request_id_;
   bool is_main_frame_;
   int64 frame_id_;
   bool parent_is_main_frame_;
   int64 parent_frame_id_;
   bool is_download_;
   bool is_stream_;
+  bool is_detachable_;
   bool allow_download_;
   bool has_user_gesture_;
   bool was_ignored_by_handler_;
   ResourceType::Type resource_type_;
   PageTransition transition_type_;
   int memory_cost_;
   WebKit::WebReferrerPolicy referrer_policy_;
   ResourceContext* context_;
   // The filter might be deleted without deleting this object if the process
   // exits during a transfer.
   base::WeakPtr<ResourceMessageFilter> filter_;
   bool is_async_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceRequestInfoImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_LOADER_RESOURCE_REQUEST_INFO_IMPL_H_