(Reland) set navigationStart based on CommonNavigationParams

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 437 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) {
-  // 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.
+// Sanitizes the navigation_start timestamp for browser-initiated navigations,
+// where the browser possibly has a better notion of start time than the
+// renderer. In the case of cross-process navigations, this carries over the
+// time of finishing the onbeforeunload handler of the previous page.
+// TimeTicks is sometimes not monotonic across processes, and because
+// |browser_navigation_start| is likely before this process existed,
+// InterProcessTimeTicksConverter won't help. The timestamp is sanitized by
+// clamping it to renderer_navigation_start, initialized earlier in the call
+// stack.
+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();
   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) Investigate how big a problem the cross process
+  // monotonicity really is and on what platforms. Log UMA for:
+  // |renderer_navigation_start - browser_navigation_start|
+  return navigation_start;
 }
 
 // PlzNavigate
 CommonNavigationParams MakeCommonNavigationParams(
     blink::WebURLRequest* request,
     bool should_replace_current_entry) {
   const RequestExtraData kEmptyData;
   const RequestExtraData* extra_data =
       static_cast<RequestExtraData*>(request->extraData());
   if (!extra_data)
@@ skipping 2108 matching lines @@
           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());
+  // TODO(clamy) We need to provide additional timing values for the Navigation
+  // Timing API to work with browser-side navigations.
+
   // 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 464 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());
+  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
@@ skipping 1477 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);
+
+  // Lower 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
@@ skipping 10 matching lines @@
   if (is_reload && no_current_entry) {
     // 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));
 
+  // Unless the load is a WebFrameLoadType::Standard, this should remain
+  // uninitialized. It will be updated when the load type is determined to be
+  // Standard, or after the previous document's unload handler has been
+  // triggered. This occurs in UpdateNavigationState.
+  // TODO(csharrison) See if we can always use the browser timestamp.
+  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 104 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_,
-                                  common_params.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 349 matching lines @@
 NavigationState* RenderFrameImpl::CreateNavigationStateFromPending() {
   if (IsBrowserInitiated(pending_navigation_params_.get())) {
     return NavigationStateImpl::CreateBrowserInitiated(
         pending_navigation_params_->common_params,
         pending_navigation_params_->start_params,
         pending_navigation_params_->request_params);
   }
   return NavigationStateImpl::CreateContentInitiated();
 }
 
+void RenderFrameImpl::UpdateNavigationState(DocumentState* document_state) {
+  if (pending_navigation_params_) {
+    // If this is a browser-initiated load that doesn't override
+    // navigation_start, set it here.
+    if (pending_navigation_params_->common_params.navigation_start.is_null()) {
+      pending_navigation_params_->common_params.navigation_start =
+          base::TimeTicks::Now();
+    }
+    document_state->set_navigation_state(CreateNavigationStateFromPending());
+    pending_navigation_params_.reset();
+  } else {
+    document_state->set_navigation_state(
+        NavigationStateImpl::CreateContentInitiated());
+  }
+}
+
 #if defined(OS_ANDROID)
 WebMediaPlayer* RenderFrameImpl::CreateAndroidWebMediaPlayer(
     WebMediaPlayerClient* client,
     WebMediaPlayerEncryptedMediaClient* encrypted_client,
     const media::WebMediaPlayerParams& params) {
   scoped_refptr<StreamTextureFactory> stream_texture_factory;
   if (SynchronousCompositorFactory* factory =
           SynchronousCompositorFactory::GetInstance()) {
     stream_texture_factory = factory->CreateStreamTextureFactory(routing_id_);
   } else {
@@ skipping 117 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