New TimeToFirstURLJob* navigation metrics now work with PlzNavigate.

content/browser/loader/resource_dispatcher_host_impl.cc

 // 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.
 
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
 
 #include <algorithm>
 #include <set>
@@ skipping 960 matching lines @@
   filter_ = NULL;
   return handled;
 }
 
 void ResourceDispatcherHostImpl::OnRequestResource(
     int routing_id,
     int request_id,
     const ResourceHostMsg_Request& request_data) {
   // When logging time-to-network only care about main frame and non-transfer
   // navigations.
-  if (request_data.resource_type == RESOURCE_TYPE_MAIN_FRAME &&
+  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableBrowserSideNavigation) &&
+      request_data.resource_type == RESOURCE_TYPE_MAIN_FRAME &&
       request_data.transferred_request_request_id == -1) {
     BrowserThread::PostTask(
         BrowserThread::UI,
         FROM_HERE,
         base::Bind(&LogResourceRequestTimeOnUI,
                    TimeTicks::Now(),
                    filter_->child_id(),
                    request_data.render_frame_id,
                    request_data.url));
   }
@@ skipping 1008 matching lines @@
   // TODO(davidben): Pass in the appropriate appcache_service. Also fix the
   // dependency on child_id/route_id. Those are used by the ResourceScheduler;
   // currently it's a no-op.
   handler = AddStandardHandlers(new_request.get(), resource_type,
                                 resource_context,
                                 nullptr,  // appcache_service
                                 -1,  // child_id
                                 -1,  // route_id
                                 handler.Pass());
 
+  if (info.is_main_frame)
+    loader->AboutToBeginNavigation(TimeTicks::Now());
+
   BeginRequestInternal(new_request.Pass(), handler.Pass());
 }
 
 // static
 int ResourceDispatcherHostImpl::CalculateApproximateMemoryCost(
     net::URLRequest* request) {
   // The following fields should be a minor size contribution (experimentally
   // on the order of 100). However since they are variable length, it could
   // in theory be a sizeable contribution.
   int strings_cost = request->extra_request_headers().ToString().size() +
@@ skipping 347 matching lines @@
 
   // Add a flag to selectively bypass the data reduction proxy if the resource
   // type is not an image.
   if (request_data.resource_type != RESOURCE_TYPE_IMAGE)
     load_flags |= net::LOAD_BYPASS_DATA_REDUCTION_PROXY;
 
   return load_flags;
 }
 
 }  // namespace content