(DEPRECATED) Send navigation_start to browser process in DidStartProvisionalLoad

content/renderer/render_frame_impl.cc

 // Copyright 2013 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.
 
 #include "content/renderer/render_frame_impl.h"
 
 #include <map>
 #include <string>
 
 #include "base/auto_reset.h"
@@ skipping 439 matching lines @@
   // passed back to the browser in the DidCommitProvisionalLoad and the
   // DocumentLoadComplete IPCs.
   base::TimeDelta ui_timestamp = common_params.ui_timestamp - base::TimeTicks();
   request.setUiStartTime(ui_timestamp.InSecondsF());
   request.setInputPerfMetricReportPolicy(
       static_cast<WebURLRequest::InputToLoadPerfMetricReportPolicy>(
           common_params.report_type));
   return request;
 }
 
-void UpdateFrameNavigationTiming(WebFrame* frame,
-                                 base::TimeTicks browser_navigation_start,
-                                 base::TimeTicks renderer_navigation_start) {
+base::TimeTicks SanitizeNavigationTiming(
+    blink::WebFrameLoadType load_type,
+    const base::TimeTicks& browser_navigation_start,
+    const base::TimeTicks& renderer_navigation_start) {
+  if (load_type != blink::WebFrameLoadType::Standard)
+    return base::TimeTicks();
   // The browser provides the navigation_start time to bootstrap the
   // Navigation Timing information for the browser-initiated navigations. In
   // case of cross-process navigations, this carries over the time of
   // finishing the onbeforeunload handler of the previous page.
+  // |browser_navigation_start| is likely before this process existed, so we
+  // can't use InterProcessTimeTicksConverter. We need at least to ensure
+  // that the browser-side navigation start we set is not later than the one
+  // on the renderer side.
   DCHECK(!browser_navigation_start.is_null());
-  if (frame->provisionalDataSource()) {
-    // |browser_navigation_start| is likely before this process existed, so we
-    // can't use InterProcessTimeTicksConverter. We need at least to ensure
-    // that the browser-side navigation start we set is not later than the one
-    // on the renderer side.
-    base::TimeTicks navigation_start = std::min(
-        browser_navigation_start, renderer_navigation_start);
-    double navigation_start_seconds =
-        (navigation_start - base::TimeTicks()).InSecondsF();
-    frame->provisionalDataSource()->setNavigationStartTime(
-        navigation_start_seconds);
-    // TODO(clamy): We need to provide additional timing values for the
-    // Navigation Timing API to work with browser-side navigations.
-  }
+  base::TimeTicks navigation_start =
+      std::min(browser_navigation_start, renderer_navigation_start);
+  // TODO(csharrison) UMA log:
+  // |renderer_navigation_start - browser_navigation_start|
+  return navigation_start;
 }
 
 // PlzNavigate
 CommonNavigationParams MakeCommonNavigationParams(
     blink::WebURLRequest* request,
-    bool should_replace_current_entry) {
+    bool should_replace_current_entry,
+    const base::TimeTicks& navigation_start) {
   const RequestExtraData kEmptyData;
   const RequestExtraData* extra_data =
       static_cast<RequestExtraData*>(request->extraData());
   if (!extra_data)
     extra_data = &kEmptyData;
   Referrer referrer(
       GURL(request->httpHeaderField(WebString::fromUTF8("Referer")).latin1()),
       request->referrerPolicy());
 
   // Set the ui timestamp for this navigation. Currently the timestamp here is
   // only non empty when the navigation was triggered by an Android intent, or
   // by the user clicking on a link. The timestamp is converted from a double
   // version supported by blink. It will be passed back to the renderer in the
   // CommitNavigation IPC, and then back to the browser again in the
   // DidCommitProvisionalLoad and the DocumentLoadComplete IPCs.
   base::TimeTicks ui_timestamp =
       base::TimeTicks() + base::TimeDelta::FromSecondsD(request->uiStartTime());
   FrameMsg_UILoadMetricsReportType::Value report_type =
       static_cast<FrameMsg_UILoadMetricsReportType::Value>(
           request->inputPerfMetricReportPolicy());
   return CommonNavigationParams(
       request->url(), referrer, extra_data->transition_type(),
       FrameMsg_Navigate_Type::NORMAL, true, should_replace_current_entry,
-      ui_timestamp, report_type, GURL(), GURL(), LOFI_UNSPECIFIED);
+      ui_timestamp, report_type, GURL(), GURL(), LOFI_UNSPECIFIED,
+      navigation_start);
 }
 
 #if !defined(OS_ANDROID) || defined(ENABLE_MEDIA_PIPELINE_ON_ANDROID)
 media::Context3D GetSharedMainThreadContext3D() {
   cc::ContextProvider* provider =
       RenderThreadImpl::current()->SharedMainThreadContextProvider().get();
   if (!provider)
     return media::Context3D();
   return media::Context3D(provider->ContextGL(), provider->GrContext());
 }
@@ skipping 2019 matching lines @@
 
   // Save these to be processed when the ensuing navigation is committed.
   WebSearchableFormData web_searchable_form_data(form);
   internal_data->set_searchable_form_url(web_searchable_form_data.url());
   internal_data->set_searchable_form_encoding(
       web_searchable_form_data.encoding().utf8());
 
   FOR_EACH_OBSERVER(RenderFrameObserver, observers_, WillSubmitForm(form));
 }
 
+void RenderFrameImpl::UpdateNavigationState(DocumentState* document_state) {
+  bool content_initiated = !pending_navigation_params_.get();
+  // Note for some browser initiated navigations (i.e. not
+  // WebFrameLoadType::Standard), we want to record their start time now. They
+  // will have had common_params.navigation_start set to null. Other
+  // content-initiated loads will have start time set when their NavigationState
+  // is constructed.
+  if (!content_initiated &&
+      pending_navigation_params_->common_params.navigation_start.is_null()) {
+    pending_navigation_params_->common_params.navigation_start =
+        base::TimeTicks::Now();
+  }
+  document_state->set_navigation_state(
+      content_initiated ? NavigationStateImpl::CreateContentInitiated()
+                        : CreateNavigationStateFromPending());
+  pending_navigation_params_.reset();
+}
+
 void RenderFrameImpl::didCreateDataSource(blink::WebLocalFrame* frame,
                                           blink::WebDataSource* datasource) {
   DCHECK(!frame_ || frame_ == frame);
 
   bool content_initiated = !pending_navigation_params_.get();
 
   // Make sure any previous redirect URLs end up in our new data source.
   if (pending_navigation_params_.get()) {
     for (const auto& i :
          pending_navigation_params_->request_params.redirects) {
@@ skipping 18 matching lines @@
         DocumentState::FromDataSource(webview->mainFrame()->dataSource());
     if (old_document_state) {
       InternalDocumentStateData* internal_data =
           InternalDocumentStateData::FromDocumentState(document_state);
       InternalDocumentStateData* old_internal_data =
           InternalDocumentStateData::FromDocumentState(old_document_state);
       internal_data->set_is_overriding_user_agent(
           old_internal_data->is_overriding_user_agent());
     }
   }
-
   // The rest of RenderView assumes that a WebDataSource will always have a
   // non-null NavigationState.
-  if (content_initiated) {
-    document_state->set_navigation_state(
-        NavigationStateImpl::CreateContentInitiated());
-  } else {
-    document_state->set_navigation_state(CreateNavigationStateFromPending());
-    pending_navigation_params_.reset();
-  }
+  UpdateNavigationState(document_state);
 
   // DocumentState::referred_by_prefetcher_ is true if we are
   // navigating from a page that used prefetching using a link on that
   // page.  We are early enough in the request process here that we
   // can still see the DocumentState of the previous page and set
   // this value appropriately.
   // TODO(gavinp): catch the important case of navigation in a new
   // renderer process.
   if (webview) {
     if (WebFrame* old_frame = webview->mainFrame()) {
@@ skipping 29 matching lines @@
         document_state->set_load_type(DocumentState::LINK_LOAD_CACHE_STALE_OK);
         break;
       case WebURLRequest::ReturnCacheDataDontLoad:  // Don't re-post.
         document_state->set_load_type(DocumentState::LINK_LOAD_CACHE_ONLY);
         break;
       default:
         NOTREACHED();
     }
   }
 
+  NavigationStateImpl* navigation_state = static_cast<NavigationStateImpl*>(
+      document_state->navigation_state());
+
+  // Set the navigation start time in blink.
+  base::TimeTicks navigation_start =
+      navigation_state->common_params().navigation_start;
+  datasource->setNavigationStartTime(
+      (navigation_start - base::TimeTicks()).InSecondsF());
+
   // Create the serviceworker's per-document network observing object if it
   // does not exist (When navigation happens within a page, the provider already
   // exists).
   if (ServiceWorkerNetworkProvider::FromDocumentState(
           DocumentState::FromDataSource(datasource)))
     return;
 
-  NavigationStateImpl* navigation_state = static_cast<NavigationStateImpl*>(
-      DocumentState::FromDataSource(datasource)->navigation_state());
-
   ServiceWorkerNetworkProvider::AttachToDocumentState(
       DocumentState::FromDataSource(datasource),
       ServiceWorkerNetworkProvider::CreateForNavigation(
           routing_id_, navigation_state->request_params(),
           frame->effectiveSandboxFlags(), content_initiated));
 }
 
 void RenderFrameImpl::didStartProvisionalLoad(blink::WebLocalFrame* frame,
                                               double triggering_event_time) {
   DCHECK(!frame_ || frame_ == frame);
@@ skipping 28 matching lines @@
         WebUserGestureIndicator::isProcessingUserGesture() ?
             NavigationGestureUser : NavigationGestureAuto);
   } else if (ds->replacesCurrentHistoryItem()) {
     // Subframe navigations that don't add session history items must be
     // marked with AUTO_SUBFRAME. See also didFailProvisionalLoad for how we
     // handle loading of error pages.
     static_cast<NavigationStateImpl*>(document_state->navigation_state())
         ->set_transition_type(ui::PAGE_TRANSITION_AUTO_SUBFRAME);
   }
 
+  // Get the navigation start in TimeTicks format. This will be
+  // lossy because blink converts TimeTicks internal int64 representation to a
+  // double. TODO(csharrison) Do we want to override this with the TimeTicks
+  // timestamp in document_state->navigation_params for browser loads?
+  DCHECK(ds->getNavigationStartTime());
+  base::TimeTicks navigation_start = base::TimeTicks::FromInternalValue(

[clamy, 2015/11/03 13:33:00]

Since we always set the start time of the DataSource using the value from the
NavigationState, why not use the timestamp from the NavigationState here?

+      ds->getNavigationStartTime() * base::Time::kMicrosecondsPerSecond);
+
   FOR_EACH_OBSERVER(RenderViewObserver, render_view_->observers(),
                     DidStartProvisionalLoad(frame));
   FOR_EACH_OBSERVER(RenderFrameObserver, observers_, DidStartProvisionalLoad());
 
   Send(new FrameHostMsg_DidStartProvisionalLoadForFrame(
-       routing_id_, ds->request().url()));
+      routing_id_, ds->request().url(), navigation_start));
 }
 
 void RenderFrameImpl::didReceiveServerRedirectForProvisionalLoad(
     blink::WebLocalFrame* frame) {
   DCHECK(!frame_ || frame_ == frame);
   render_view_->history_controller()->RemoveChildrenForRedirect(this);
 }
 
 void RenderFrameImpl::didFailProvisionalLoad(
     blink::WebLocalFrame* frame,
@@ skipping 401 matching lines @@
     blink::WebHistoryCommitType commit_type) {
   TRACE_EVENT1("navigation", "RenderFrameImpl::didNavigateWithinPage",
                "id", routing_id_);
   DCHECK(!frame_ || frame_ == frame);
   // If this was a reference fragment navigation that we initiated, then we
   // could end up having a non-null pending navigation params.  We just need to
   // update the ExtraData on the datasource so that others who read the
   // ExtraData will get the new NavigationState.  Similarly, if we did not
   // initiate this navigation, then we need to take care to reset any pre-
   // existing navigation state to a content-initiated navigation state.
-  // didCreateDataSource conveniently takes care of this for us.
-  didCreateDataSource(frame, frame->dataSource());
-
+  // UpdateNavigationState conveniently takes care of this for us.
   DocumentState* document_state =
       DocumentState::FromDataSource(frame->dataSource());
+  DCHECK(document_state);
+  UpdateNavigationState(document_state);
   static_cast<NavigationStateImpl*>(document_state->navigation_state())
       ->set_was_within_same_page(true);
-
   didCommitProvisionalLoad(frame, item, commit_type);
 }
 
 void RenderFrameImpl::didUpdateCurrentHistoryItem(blink::WebLocalFrame* frame) {
   DCHECK(!frame_ || frame_ == frame);
   // TODO(nasko): Move implementation here. Needed methods:
   // * StartNavStateSyncTimerIfNecessary
   render_view_->didUpdateCurrentHistoryItem(frame);
 }
 
@@ skipping 1159 matching lines @@
       common_params.url, request_params, &is_reload, &cache_policy);
 
   GetContentClient()->SetActiveURL(common_params.url);
 
   pending_navigation_params_.reset(new NavigationParams(
       common_params, StartNavigationParams(), request_params));
 
   // Inform the browser of the start of the provisional load. This is needed so
   // that the load is properly tracked by the WebNavigation API.
   Send(new FrameHostMsg_DidStartProvisionalLoadForFrame(
-      routing_id_, common_params.url));
+      routing_id_, common_params.url, common_params.navigation_start));
 
   // Send the provisional load failure.
   blink::WebURLError error =
       CreateWebURLError(common_params.url, has_stale_copy_in_cache, error_code);
   WebURLRequest failed_request = CreateURLRequestForNavigation(
       common_params, scoped_ptr<StreamOverrideParameters>(),
       frame_->isViewSourceModeEnabled());
   SendFailedProvisionalLoad(failed_request, error, frame_);
 
   if (!ShouldDisplayErrorPageForFailedLoad(error_code, common_params.url)) {
@@ skipping 283 matching lines @@
 }
 
 void RenderFrameImpl::NavigateInternal(
     const CommonNavigationParams& common_params,
     const StartNavigationParams& start_params,
     const RequestNavigationParams& request_params,
     scoped_ptr<StreamOverrideParameters> stream_params) {
   bool browser_side_navigation =
       base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kEnableBrowserSideNavigation);
+  // Upper bound for browser initiated navigation start time.
+  base::TimeTicks renderer_navigation_start = base::TimeTicks::Now();
   bool is_reload = IsReload(common_params.navigation_type);
   bool is_history_navigation = request_params.page_state.IsValid();
   WebURLRequest::CachePolicy cache_policy =
       WebURLRequest::UseProtocolCachePolicy;
   RenderFrameImpl::PrepareRenderViewForNavigation(
       common_params.url, request_params, &is_reload, &cache_policy);
 
   GetContentClient()->SetActiveURL(common_params.url);
 
   // If this frame isn't in the same process as the main frame, it may naively
   // assume that this is the first navigation in the iframe, but this may not
   // actually be the case. Inform the frame's state machine if this frame has
   // already committed other loads.
   if (request_params.has_committed_real_load && frame_->parent())
     frame_->setCommittedFirstRealLoad();
 
   if (is_reload && !render_view_->history_controller()->GetCurrentEntry()) {
     // We cannot reload if we do not have any history state.  This happens, for
     // example, when recovering from a crash.
     is_reload = false;
     cache_policy = WebURLRequest::ReloadIgnoringCacheData;
   }
 
   pending_navigation_params_.reset(
       new NavigationParams(common_params, start_params, request_params));
+  // We don't know for sure that this load type is WebFrameLoadType::Standard.
+  // For now, set this to null, and update it when we are sure of the right
+  // value.

[clamy, 2015/11/03 13:33:00]

Could we check with Navigation Timing API people whether we should also use the
browser-provided timestamp for reloads and history loads? I think it would make
sense to do so, and the code would be simpler.

+  pending_navigation_params_->common_params.navigation_start =
+      base::TimeTicks();
 
   // Create parameters for a standard navigation.
   blink::WebFrameLoadType load_type = blink::WebFrameLoadType::Standard;
   bool should_load_request = false;
   WebHistoryItem item_for_history_navigation;
   WebURLRequest request = CreateURLRequestForNavigation(
       common_params, stream_params.Pass(), frame_->isViewSourceModeEnabled());
 #if defined(OS_ANDROID)
   request.setHasUserGesture(start_params.has_user_gesture);
 #endif
@@ skipping 111 matching lines @@
       request.setHTTPBody(http_body);
     }
 
     // A session history navigation should have been accompanied by state.
     CHECK_EQ(request_params.page_id, -1);
 
     should_load_request = true;
   }
 
   if (should_load_request) {
-    // Record this before starting the load. We need a lower bound of this
-    // time to sanitize the navigationStart override set below.
-    base::TimeTicks renderer_navigation_start = base::TimeTicks::Now();
-
+    // Sanitize navigation start now that we know the load_type.
+    pending_navigation_params_->common_params.navigation_start =
+        SanitizeNavigationTiming(load_type, common_params.navigation_start,
+                                 renderer_navigation_start);
     // Perform a navigation to a data url if needed.
     if (!common_params.base_url_for_data_url.is_empty() ||
         (browser_side_navigation &&
          common_params.url.SchemeIs(url::kDataScheme))) {
       LoadDataURL(common_params, frame_);
     } else {
       // Load the request.
       frame_->toWebLocalFrame()->load(request, load_type,
                                       item_for_history_navigation);
     }
-
-    if (load_type == blink::WebFrameLoadType::Standard) {
-      UpdateFrameNavigationTiming(frame_,
-                                  request_params.browser_navigation_start,
-                                  renderer_navigation_start);
-    }
   }
 
   // In case LoadRequest failed before didCreateDataSource was called.
   pending_navigation_params_.reset();
 }
 
 void RenderFrameImpl::UpdateEncoding(WebFrame* frame,
                                      const std::string& encoding_name) {
   // Only update main frame's encoding_name.
   if (!frame->parent())
@@ skipping 170 matching lines @@
   // Note: At this stage, the goal is to apply all the modifications the
   // renderer wants to make to the request, and then send it to the browser, so
   // that the actual network request can be started. Ideally, all such
   // modifications should take place in willSendRequest, and in the
   // implementation of willSendRequest for the various InspectorAgents
   // (devtools).
   //
   // TODO(clamy): Apply devtools override.
   // TODO(clamy): Make sure that navigation requests are not modified somewhere
   // else in blink.
+
+  base::TimeTicks navigation_start = base::TimeTicks::Now();

[clamy, 2015/11/03 13:33:00]

I don't think this is needed. None of the functions below take time to execute,
so we can postpone getting the navigation_start time until we construct the
CommonNavigationParams.

+
   willSendRequest(frame_, 0, *request, blink::WebURLResponse());
 
   // TODO(clamy): Same-document navigations should not be sent back to the
   // browser.
   // TODO(clamy): Data urls should not be sent back to the browser either.
   bool should_replace_current_entry = false;
   WebDataSource* provisional_data_source = frame_->provisionalDataSource();
   WebDataSource* current_data_source = frame_->dataSource();
   WebDataSource* data_source =
       provisional_data_source ? provisional_data_source : current_data_source;
@@ skipping 13 matching lines @@
   DCHECK(GetFetchRedirectModeForWebURLRequest(*request) ==
          FetchRedirectMode::MANUAL_MODE);
   DCHECK(frame_->parent() ||
          GetRequestContextFrameTypeForWebURLRequest(*request) ==
              REQUEST_CONTEXT_FRAME_TYPE_TOP_LEVEL);
   DCHECK(!frame_->parent() ||
          GetRequestContextFrameTypeForWebURLRequest(*request) ==
              REQUEST_CONTEXT_FRAME_TYPE_NESTED);
 
   Send(new FrameHostMsg_BeginNavigation(
-      routing_id_,
-      MakeCommonNavigationParams(request, should_replace_current_entry),
+      routing_id_, MakeCommonNavigationParams(
+                       request, should_replace_current_entry, navigation_start),
       BeginNavigationParams(
           request->httpMethod().latin1(), GetWebURLRequestHeaders(*request),
           GetLoadFlagsForWebURLRequest(*request), request->hasUserGesture(),
           request->skipServiceWorker(),
           GetRequestContextTypeForWebURLRequest(*request)),
       GetRequestBodyForWebURLRequest(*request)));
 }
 
 void RenderFrameImpl::LoadDataURL(const CommonNavigationParams& params,
                                   WebFrame* frame) {
@@ skipping 252 matching lines @@
   mojo::ServiceProviderPtr service_provider;
   mojo::URLRequestPtr request(mojo::URLRequest::New());
   request->url = mojo::String::From(url);
   mojo_shell_->ConnectToApplication(request.Pass(), GetProxy(&service_provider),
                                     nullptr, nullptr,
                                     base::Bind(&OnGotContentHandlerID));
   return service_provider.Pass();
 }
 
 }  // namespace content