Plumb network stack information about existence of cached copy

webkit/child/resource_loader_bridge.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.
 //
 // The intent of this file is to provide a type-neutral abstraction between
 // Chrome and WebKit for resource loading. This pure-virtual interface is
 // implemented by the embedder.
 //
 // One of these objects will be created by WebKit for each request. WebKit
 // will own the pointer to the bridge, and will delete it when the request is
@@ skipping 160 matching lines @@
 
     // Called when metadata generated by the renderer is retrieved from the
     // cache. This method may be called zero or one times.
     virtual void OnReceivedCachedMetadata(const char* data, int len) { }
 
     // Called when the response is complete.  This method signals completion of
     // the resource load.
     virtual void OnCompletedRequest(
         int error_code,
         bool was_ignored_by_handler,
+        bool stale_copy_in_cache,
         const std::string& security_info,
         const base::TimeTicks& completion_time) = 0;
 
    protected:
     virtual ~Peer() {}
   };
 
   // use WebKitPlatformSupportImpl::CreateResourceLoader() for construction, but
   // anybody can delete at any time, INCLUDING during processing of callbacks.
   WEBKIT_CHILD_EXPORT virtual ~ResourceLoaderBridge();
@@ skipping 37 matching lines @@
   // methods may be called to construct the body of the request.
   WEBKIT_CHILD_EXPORT ResourceLoaderBridge();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ResourceLoaderBridge);
 };
 
 }  // namespace webkit_glue
 
 #endif  // WEBKIT_CHILD_RESOURCE_LOADER_BRIDGE_H_