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

content/common/resource_messages.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.
 
 // IPC messages for resource loading.
 
 // Multiply-included message file, hence no include guard.
 #include "base/shared_memory.h"
 #include "content/common/resource_response.h"
 #include "content/public/common/common_param_traits.h"
@@ skipping 98 matching lines @@
   // Identifies the parent frame of the frame that sent the request.
   // -1 if unknown / invalid.
   IPC_STRUCT_MEMBER(int64, parent_frame_id)
 
   IPC_STRUCT_MEMBER(content::PageTransition, transition_type)
 IPC_STRUCT_END()
 
 // Resource messages sent from the browser to the renderer.
 
 // Sent when the headers are available for a resource request.
-IPC_MESSAGE_ROUTED2(ResourceMsg_ReceivedResponse,
+IPC_MESSAGE_ROUTED4(ResourceMsg_ReceivedResponse,
                     int /* request_id */,
-                    ResourceResponseHead)
+                    ResourceResponseHead,
+                    base::TimeTicks /* start_time */,
+                    base::TimeTicks /* end_time */)
 
 // Sent when cached metadata from a resource request is ready.
 IPC_MESSAGE_ROUTED2(ResourceMsg_ReceivedCachedMetadata,
                     int /* request_id */,
                     std::vector<char> /* data */)
 
 // Sent as upload progress is being made.
 IPC_MESSAGE_ROUTED3(ResourceMsg_UploadProgress,
                     int /* request_id */,
                     int64 /* position */,
                     int64 /* size */)
 
 // Sent when the request has been redirected.  The receiver is expected to
 // respond with either a FollowRedirect message (if the redirect is to be
 // followed) or a CancelRequest message (if it should not be followed).
-IPC_MESSAGE_ROUTED3(ResourceMsg_ReceivedRedirect,
+IPC_MESSAGE_ROUTED5(ResourceMsg_ReceivedRedirect,
                     int /* request_id */,
                     GURL /* new_url */,
-                    ResourceResponseHead)
+                    ResourceResponseHead,
+                    base::TimeTicks /* start_time */,
+                    base::TimeTicks /* end_time */)
 
 // Sent when some data from a resource request is ready. The handle should
 // already be mapped into the process that receives this message.
 IPC_MESSAGE_ROUTED4(ResourceMsg_DataReceived,
                     int /* request_id */,
                     base::SharedMemoryHandle /* data */,
                     int /* data_len */,
                     int /* encoded_data_length */)
 
 // 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_ROUTED2(ResourceMsg_DataDownloaded,
                     int /* request_id */,
                     int /* data_len */)
 
 // Sent when the request has been completed.
 IPC_MESSAGE_ROUTED4(ResourceMsg_RequestComplete,
                     int /* request_id */,
                     net::URLRequestStatus /* status */,
                     std::string /* security info */,
-                    base::Time /* completion_time */)
+                    base::TimeTicks /* completion_time */)
 
 // 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_ROUTED1(ResourceHostMsg_CancelRequest,
@@ skipping 29 matching lines @@
                     int /* request_id */)
 
 // Sent by the renderer process to acknowledge receipt of a
 // UploadProgress message.
 IPC_MESSAGE_ROUTED1(ResourceHostMsg_UploadProgress_ACK,
                     int /* request_id */)
 
 // Sent when the renderer process deletes a resource loader.
 IPC_MESSAGE_CONTROL1(ResourceHostMsg_ReleaseDownloadedFile,
                      int /* request_id */)