Balance defers with Resume.

content/browser/renderer_host/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_RENDERER_HOST_RESOURCE_REQUEST_INFO_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RESOURCE_REQUEST_INFO_IMPL_H_
 #pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/supports_user_data.h"
 #include "base/time.h"
 #include "content/public/browser/resource_request_info.h"
 #include "content/public/common/page_transition_types.h"
 #include "content/public/common/process_type.h"
 #include "content/public/common/referrer.h"
 #include "net/base/load_states.h"
 #include "webkit/glue/resource_type.h"
 
 namespace webkit_blob {
 class BlobData;
 }
 
 namespace content {
+class AsyncResourceHandler;
 class CrossSiteResourceHandler;
 class ResourceContext;
 struct GlobalRequestID;
 
 // Holds the data ResourceDispatcherHost associates with each request.
 // Retrieve this data by calling ResourceDispatcherHost::InfoForRequest.
 class ResourceRequestInfoImpl : public ResourceRequestInfo,
                                 public base::SupportsUserData::Data {
  public:
   // Returns the ResourceRequestInfoImpl associated with the given URLRequest.
@@ skipping 37 matching lines @@
   virtual ResourceType::Type GetResourceType() const OVERRIDE;
   virtual WebKit::WebReferrerPolicy GetReferrerPolicy() const OVERRIDE;
   virtual uint64 GetUploadSize() const OVERRIDE;
   virtual bool GetAssociatedRenderView(int* render_process_id,
                                        int* render_view_id) const OVERRIDE;
 
   void AssociateWithRequest(net::URLRequest* request);
 
   GlobalRequestID GetGlobalRequestID() const;
 
-  // CrossSiteResourceHandler for this request, if it is a cross-site request.
-  // (NULL otherwise.) This handler is part of the chain of ResourceHandlers
-  // pointed to by resource_handler, and is not owned by this class.
+  // CrossSiteResourceHandler for this request.  May be null.
   CrossSiteResourceHandler* cross_site_handler() {
     return cross_site_handler_;
   }
   void set_cross_site_handler(CrossSiteResourceHandler* h) {
     cross_site_handler_ = h;
   }
 
+  // AsyncResourceHandler for this request.  May be null.
+  AsyncResourceHandler* async_handler() {
+    return async_handler_;
+  }
+  void set_async_handler(AsyncResourceHandler* h) {
+    async_handler_ = h;
+  }
+
   // Identifies the type of process (renderer, plugin, etc.) making the request.
   ProcessType process_type() const {
     return process_type_;
   }
 
-  // Number of messages we've sent to the renderer that we haven't gotten an
-  // ACK for. This allows us to avoid having too many messages in flight.
-  int pending_data_count() const { return pending_data_count_; }
-  void IncrementPendingDataCount() { pending_data_count_++; }
-  void DecrementPendingDataCount() { pending_data_count_--; }
-
   // Downloads are allowed only as a top level request.
   bool allow_download() const { return allow_download_; }
 
   bool has_user_gesture() const { return has_user_gesture_; }
 
   // Whether this is a download.
   bool is_download() const { return is_download_; }
   void set_is_download(bool download) { is_download_ = download; }
 
   PageTransition transition_type() const { return transition_type_; }
 
   void set_upload_size(uint64 upload_size) { upload_size_ = upload_size; }
 
   // 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; }
 
   // We hold a reference to the requested blob data to ensure it doesn't
   // get finally released prior to the net::URLRequestJob being started.
   webkit_blob::BlobData* requested_blob_data() const {
     return requested_blob_data_.get();
   }
   void set_requested_blob_data(webkit_blob::BlobData* data);
 
  private:
   // Non-owning, may be NULL.
   CrossSiteResourceHandler* cross_site_handler_;
+  AsyncResourceHandler* async_handler_;
 
   ProcessType 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_;
-  int pending_data_count_;
   bool is_download_;
   bool allow_download_;
   bool has_user_gesture_;
   ResourceType::Type resource_type_;
   PageTransition transition_type_;
   uint64 upload_size_;
   int memory_cost_;
   scoped_refptr<webkit_blob::BlobData> requested_blob_data_;
   WebKit::WebReferrerPolicy referrer_policy_;
   ResourceContext* context_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceRequestInfoImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RESOURCE_REQUEST_INFO_IMPL_H_