Use a monotonic clock (TimeTicks) to report network times to WebCore.

content/common/resource_dispatcher.h

 // Copyright (c) 2011 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
 
 #ifndef CONTENT_COMMON_RESOURCE_DISPATCHER_H_
 #define CONTENT_COMMON_RESOURCE_DISPATCHER_H_
 #pragma once
 
 #include <deque>
 #include <string>
 
 #include "base/hash_tables.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/shared_memory.h"
+#include "base/time.h"
 #include "content/common/content_export.h"
 #include "ipc/ipc_channel.h"
 #include "webkit/glue/resource_loader_bridge.h"
 
 namespace content {
 class ResourceDispatcherDelegate;
 struct ResourceResponseHead;
 }
 
 // This class serves as a communication interface between the
@@ skipping 44 matching lines @@
 
   typedef std::deque<IPC::Message*> MessageQueue;
   struct PendingRequestInfo {
     PendingRequestInfo() { }
     PendingRequestInfo(webkit_glue::ResourceLoaderBridge::Peer* peer,
                        ResourceType::Type resource_type,
                        const GURL& request_url)
         : peer(peer),
           resource_type(resource_type),
           is_deferred(false),
-          url(request_url) {
+          url(request_url),
+          request_start(base::TimeTicks::Now()) {
     }
     ~PendingRequestInfo() { }
     webkit_glue::ResourceLoaderBridge::Peer* peer;
     ResourceType::Type resource_type;
     MessageQueue deferred_message_queue;
     bool is_deferred;
     GURL url;
     linked_ptr<IPC::Message> pending_redirect_message;
+    base::TimeTicks request_start;
+    base::TimeTicks response_start;
+    base::TimeTicks completion_time;
   };
   typedef base::hash_map<int, PendingRequestInfo> PendingRequestList;
 
   // Helper to lookup the info based on the request_id.
   // May return NULL if the request as been canceled from the client side.
   PendingRequestInfo* GetPendingRequestInfo(int request_id);
 
   // Follows redirect, if any, for the given request.
   void FollowPendingRedirect(int request_id, PendingRequestInfo& request_info);
 
   // Message response handlers, called by the message handler for this process.
   void OnUploadProgress(
       const IPC::Message& message,
       int request_id,
       int64 position,
       int64 size);
   void OnReceivedResponse(int request_id, const content::ResourceResponseHead&);
   void OnReceivedCachedMetadata(int request_id, const std::vector<char>& data);
   void OnReceivedRedirect(
       const IPC::Message& message,
       int request_id,
       const GURL& new_url,
-      const webkit_glue::ResourceResponseInfo& info);
+      const content::ResourceResponseHead& response_head);
   void OnReceivedData(
       const IPC::Message& message,
       int request_id,
       base::SharedMemoryHandle data,
       int data_len,
       int encoded_data_length);
   void OnDownloadedData(
       const IPC::Message& message,
       int request_id,
       int data_len);
   void OnRequestComplete(
       int request_id,
       const net::URLRequestStatus& status,
       const std::string& security_info,
-      const base::Time& completion_time);
+      const base::TimeTicks& completion_time);
 
   // Dispatch the message to one of the message response handlers.
   void DispatchMessage(const IPC::Message& message);
 
   // Dispatch any deferred messages for the given request, provided it is not
   // again in the deferred state.
   void FlushDeferredMessages(int request_id);
 
+  void ToResourceResponseInfo(
+      const PendingRequestInfo& request_info,
+      const content::ResourceResponseHead& browser_info,
+      webkit_glue::ResourceResponseInfo* renderer_info) const;
+
+  base::TimeTicks ToRendererCompletionTime(
+      const PendingRequestInfo& request_info,
+      const base::TimeTicks& browser_completion_time) const;
+
   // Returns true if the message passed in is a resource related message.
   static bool IsResourceDispatcherMessage(const IPC::Message& message);
 
   // ViewHostMsg_Resource_DataReceived is not POD, it has a shared memory
   // handle in it that we should cleanup it up nicely. This method accepts any
   // message and determine whether the message is
   // ViewHostMsg_Resource_DataReceived and clean up the shared memory handle.
   static void ReleaseResourcesInDataMessage(const IPC::Message& message);
 
   // Iterate through a message queue and clean up the messages by calling
   // ReleaseResourcesInDataMessage and removing them from the queue. Intended
   // for use on deferred message queues that are no longer needed.
   static void ReleaseResourcesInMessageQueue(MessageQueue* queue);
 
   IPC::Message::Sender* message_sender_;
 
   // All pending requests issued to the host
   PendingRequestList pending_requests_;
 
   base::WeakPtrFactory<ResourceDispatcher> weak_factory_;
 
   content::ResourceDispatcherDelegate* delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceDispatcher);
 };
 
 #endif  // CONTENT_COMMON_RESOURCE_DISPATCHER_H_