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

webkit/tools/test_shell/simple_resource_loader_bridge.cc

 // 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.
 //
 // This file contains an implementation of the ResourceLoaderBridge class.
 // The class is implemented using net::URLRequest, meaning it is a "simple"
 // version that directly issues requests. The more complicated one used in the
 // browser uses IPC.
 //
 // Because net::URLRequest only provides an asynchronous resource loading API,
@@ skipping 252 matching lines @@
 
     // Continue reading more data, see the comment in NotifyReceivedData.
     g_io_thread->message_loop()->PostTask(FROM_HERE, NewRunnableMethod(
         this, &RequestProxy::AsyncReadData));
 
     peer_->OnDownloadedData(bytes_read);
   }
 
   void NotifyCompletedRequest(const net::URLRequestStatus& status,
                               const std::string& security_info,
-                              const base::Time& complete_time) {
+                              const base::TimeTicks& complete_time) {
     if (peer_) {
       peer_->OnCompletedRequest(status, security_info, complete_time);
       DropPeer();  // ensure no further notifications
     }
   }
 
   void NotifyUploadProgress(uint64 position, uint64 size) {
     if (peer_)
       peer_->OnUploadProgress(position, size);
   }
@@ skipping 110 matching lines @@
           this, &RequestProxy::NotifyDownloadedData, bytes_read));
       return;
     }
 
     owner_loop_->PostTask(FROM_HERE, NewRunnableMethod(
         this, &RequestProxy::NotifyReceivedData, bytes_read));
   }
 
   virtual void OnCompletedRequest(const net::URLRequestStatus& status,
                                   const std::string& security_info,
-                                  const base::Time& complete_time) {
+                                  const base::TimeTicks& complete_time) {
     if (download_to_file_)
       file_stream_.Close();
     owner_loop_->PostTask(FROM_HERE, NewRunnableMethod(
         this,
         &RequestProxy::NotifyCompletedRequest,
         status,
         security_info,
         complete_time));
   }
 
@@ skipping 64 matching lines @@
 
   // --------------------------------------------------------------------------
   // Helpers and data:
 
   void Done() {
     if (upload_progress_timer_.IsRunning()) {
       MaybeUpdateUploadProgress();
       upload_progress_timer_.Stop();
     }
     DCHECK(request_.get());
-    OnCompletedRequest(request_->status(), std::string(), base::Time());
+    OnCompletedRequest(request_->status(), std::string(), base::TimeTicks());
     request_.reset();  // destroy on the io thread
   }
 
   // Called on the IO thread.
   void MaybeUpdateUploadProgress() {
     // If a redirect is received upload is cancelled in net::URLRequest, we
     // should try to stop the |upload_progress_timer_| timer and return.
     if (!request_->has_upload()) {
       if (upload_progress_timer_.IsRunning())
         upload_progress_timer_.Stop();
@@ skipping 107 matching lines @@
   virtual void OnReceivedData(int bytes_read) {
     if (download_to_file_)
       file_stream_.Write(buf_->data(), bytes_read, NULL);
     else
       result_->data.append(buf_->data(), bytes_read);
     AsyncReadData();  // read more (may recurse)
   }
 
   virtual void OnCompletedRequest(const net::URLRequestStatus& status,
                                   const std::string& security_info,
-                                  const base::Time& complete_time) {
+                                  const base::TimeTicks& complete_time) {
     if (download_to_file_)
       file_stream_.Close();
     result_->status = status;
     event_.Signal();
   }
 
  private:
   ResourceLoaderBridge::SyncLoadResponse* result_;
   base::WaitableEvent event_;
 };
@@ skipping 291 matching lines @@
 
 // static
 scoped_refptr<base::MessageLoopProxy>
     SimpleResourceLoaderBridge::GetIoThread() {
   if (!EnsureIOThread()) {
     LOG(DFATAL) << "Failed to create IO thread.";
     return NULL;
   }
   return g_io_thread->message_loop_proxy();
 }