Plumb network stack information about existence of cached copy

content/common/resource_messages.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.
 
 // IPC messages for resource loading.
 //
 // NOTE: All messages must send an |int request_id| as their first parameter.
 
 // Multiply-included message file, hence no include guard.
 #include "base/memory/shared_memory.h"
@@ skipping 195 matching lines @@
   // created before this navigation has been transferred to a new render view.
   // This serves the purpose of recycling the old request.
   // Unless this refers to a transferred navigation, these values are -1 and -1.
   IPC_STRUCT_MEMBER(int, transferred_request_child_id)
   IPC_STRUCT_MEMBER(int, transferred_request_request_id)
 
   // Whether or not we should allow the URL to download.
   IPC_STRUCT_MEMBER(bool, allow_download)
 IPC_STRUCT_END()
 
+// Parameters for a ResourceMsg_RequestComplete
+IPC_STRUCT_BEGIN(ResourceMsg_RequestCompleteData)
+  // The error code.
+  IPC_STRUCT_MEMBER(int, error_code)
+
+  // Was ignored by the request handler.
+  IPC_STRUCT_MEMBER(bool, was_ignored_by_handler)
+
+  // A copy of the data requested exists in the cache

[palmer, 2014/01/29 23:22:47]

Nit: Period at the end of the sentence. :)

[Randy Smith (Not in Mondays), 2014/02/04 19:59:54]

Done.

+  IPC_STRUCT_MEMBER(bool, exists_in_cache)
+
+  // Serialized security info; see content/common/ssl_status_serialization.h.
+  IPC_STRUCT_MEMBER(std::string, security_info)
+
+  // Time the request completed.
+  IPC_STRUCT_MEMBER(base::TimeTicks, completion_time)
+IPC_STRUCT_END()
+
 // Resource messages sent from the browser to the renderer.
 
 // Sent when the headers are available for a resource request.
 IPC_MESSAGE_CONTROL2(ResourceMsg_ReceivedResponse,
                      int /* request_id */,
                      content::ResourceResponseHead)
 
 // Sent when cached metadata from a resource request is ready.
 IPC_MESSAGE_CONTROL2(ResourceMsg_ReceivedCachedMetadata,
                      int /* request_id */,
@@ skipping 41 matching lines @@
 
 // Sent when some data from a resource request has been downloaded to
 // file. This is only called in the 'download_to_file' case and replaces
 // ResourceMsg_DataReceived in the call sequence in that case.
 IPC_MESSAGE_CONTROL3(ResourceMsg_DataDownloaded,
                      int /* request_id */,
                      int /* data_len */,
                      int /* encoded_data_length */)
 
 // Sent when the request has been completed.
-IPC_MESSAGE_CONTROL5(ResourceMsg_RequestComplete,
+IPC_MESSAGE_CONTROL2(ResourceMsg_RequestComplete,
                      int /* request_id */,
-                     int /* error_code */,
-                     bool /* was_ignored_by_handler */,
-                     std::string /* security info */,
-                     base::TimeTicks /* completion_time */)
+                     ResourceMsg_RequestCompleteData)
 
 // Resource messages sent from the renderer to the browser.
 
 // Makes a resource request via the browser.
 IPC_MESSAGE_ROUTED2(ResourceHostMsg_RequestResource,
                     int /* request_id */,
                     ResourceHostMsg_Request)
 
 // Cancels a resource request with the ID given as the parameter.
 IPC_MESSAGE_CONTROL1(ResourceHostMsg_CancelRequest,
@@ skipping 27 matching lines @@
                      int /* request_id */)
 
 // Sent when the renderer process deletes a resource loader.
 IPC_MESSAGE_CONTROL1(ResourceHostMsg_ReleaseDownloadedFile,
                      int /* request_id */)
 
 // Sent by the renderer when a resource request changes priority.
 IPC_MESSAGE_CONTROL2(ResourceHostMsg_DidChangePriority,
                      int /* request_id */,
                      net::RequestPriority)