Set navigationStart correctly for all load types.

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 <utility>
 #include <vector>
@@ skipping 547 matching lines @@
 // 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());
   base::TimeTicks navigation_start =
       std::min(browser_navigation_start, renderer_navigation_start);
   base::TimeDelta difference =
       renderer_navigation_start - browser_navigation_start;
   if (difference > base::TimeDelta()) {
     UMA_HISTOGRAM_TIMES("Navigation.Start.RendererBrowserDifference.Positive",
                         difference);
   } else {
     UMA_HISTOGRAM_TIMES("Navigation.Start.RendererBrowserDifference.Negative",
@@ skipping 4450 matching lines @@
       info.navigationType == blink::WebNavigationTypeOther;
 
   if (is_fork) {
     // Open the URL via the browser, not via WebKit.
     OpenURL(url, IsHttpPost(info.urlRequest),
             GetRequestBodyForWebURLRequest(info.urlRequest), Referrer(),
             info.defaultPolicy, info.replacesCurrentHistoryItem, false);
     return blink::WebNavigationPolicyIgnore;
   }
 
-  // Execute the BeforeUnload event. If asked not to proceed or the frame is
-  // destroyed, ignore the navigation. There is no need to execute the
-  // BeforeUnload event during a redirect, since it was already executed at the
-  // start of the navigation.
-  // PlzNavigate: this is not executed when commiting the navigation.
-  if (info.defaultPolicy == blink::WebNavigationPolicyCurrentTab &&
-      !is_redirect && (!IsBrowserSideNavigationEnabled() ||
-                       info.urlRequest.checkForBrowserSideNavigation())) {
+  bool should_dispatch_before_unload =
+      info.defaultPolicy == blink::WebNavigationPolicyCurrentTab &&
+      // There is no need to execute the BeforeUnload event during a redirect,
+      // since it was already executed at the start of the navigation.
+      !is_redirect &&
+      // PlzNavigate: this should not be executed when commiting the navigation.
+      (!IsBrowserSideNavigationEnabled() ||
+       info.urlRequest.checkForBrowserSideNavigation()) &&
+      // No need to dispatch beforeunload if the frame has not committed a
+      // navigation and contains an empty initial document.
+      (frame_->getDidAccessInitialDocument() ||
+       !current_history_item_.isNull());
+
+  if (should_dispatch_before_unload) {
+    // Execute the BeforeUnload event. If asked not to proceed or the frame is
+    // destroyed, ignore the navigation.
     // Keep a WeakPtr to this RenderFrameHost to detect if executing the
     // BeforeUnload event destriyed this frame.
     base::WeakPtr<RenderFrameImpl> weak_self = weak_factory_.GetWeakPtr();
 
     if (!frame_->dispatchBeforeUnloadEvent(info.navigationType ==
                                            blink::WebNavigationTypeReload) ||
         !weak_self) {
       return blink::WebNavigationPolicyIgnore;
     }
+    // navigation_start must be recorded immediately after dispatching the

[clamy, 2016/07/21 11:52:44]

nit: blank line above.
s/navigation_start/|navigation_start|

[Alexander Semashko, 2016/07/21 14:00:22]

Done.

+    // beforeunload event.
+    if (pending_navigation_params_) {
+      pending_navigation_params_->common_params.navigation_start =
+          base::TimeTicks::Now();
+    }
   }
 
   // PlzNavigate: if the navigation is not synchronous, send it to the browser.
   // This includes navigations with no request being sent to the network stack.
   if (IsBrowserSideNavigationEnabled() &&
       info.urlRequest.checkForBrowserSideNavigation() &&
       ShouldMakeNetworkRequestForURL(url)) {
     BeginNavigation(&info.urlRequest, info.replacesCurrentHistoryItem,
                     info.isClientRedirect);
     return blink::WebNavigationPolicyHandledByClient;
@@ skipping 377 matching lines @@
   }
 
   // If the navigation is for "view source", the WebLocalFrame needs to be put
   // in a special mode.
   if (request_params.is_view_source)
     frame_->enableViewSourceMode(true);
 
   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.
+  // Sanitize navigation start and store in |pending_navigation_params_|.
+  // It will be picked up in UpdateNavigationState.
   pending_navigation_params_->common_params.navigation_start =
-      base::TimeTicks();
+      SanitizeNavigationTiming(common_params.navigation_start,
+                               renderer_navigation_start);
 
   // Create parameters for a standard navigation, indicating whether it should
   // replace the current NavigationEntry.
   blink::WebFrameLoadType load_type =
       common_params.should_replace_current_entry
           ? blink::WebFrameLoadType::ReplaceCurrentItem
           : blink::WebFrameLoadType::Standard;
   blink::WebHistoryLoadType history_load_type =
       blink::WebHistoryDifferentDocumentLoad;
   bool should_load_request = false;
@@ skipping 102 matching lines @@
           GetWebHTTPBodyForRequestBody(common_params.post_data));
     }
 
     // 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) {
-    // 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);
-
     // PlzNavigate: check if the navigation being committed originated as a
     // client redirect.
     bool is_client_redirect =
         browser_side_navigation
             ? !!(common_params.transition & ui::PAGE_TRANSITION_CLIENT_REDIRECT)
             : false;
 
     // Perform a navigation to a data url if needed.
     // Note: the base URL might be invalid, so also check the data URL string.
     bool should_load_data_url = !common_params.base_url_for_data_url.is_empty();
@@ skipping 419 matching lines @@
   // If this was a browser-initiated navigation, then there could be pending
   // navigation params, so use them. Otherwise, just reset the document state
   // here, since if pending navigation params exist they are for some other
   // navigation <https://crbug.com/597239>.
   if (!pending_navigation_params_ || content_initiated) {
     document_state->set_navigation_state(
         NavigationStateImpl::CreateContentInitiated());
     return;
   }
 
-  // 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();
-  }
+  DCHECK(!pending_navigation_params_->common_params.navigation_start.is_null());
   document_state->set_navigation_state(CreateNavigationStateFromPending());
 
   // The |set_was_load_data_with_base_url_request| state should not change for
   // an in-page navigation, so skip updating it from the in-page navigation
   // params in this case.
   if (!was_within_same_page) {
     const CommonNavigationParams& common_params =
         pending_navigation_params_->common_params;
     bool load_data = !common_params.base_url_for_data_url.is_empty() &&
                      !common_params.history_url_for_data_url.is_empty() &&
@@ skipping 282 matching lines @@
   // event target. Potentially a Pepper plugin will receive the event.
   // In order to tell whether a plugin gets the last mouse event and which it
   // is, we set |pepper_last_mouse_event_target_| to null here. If a plugin gets
   // the event, it will notify us via DidReceiveMouseEvent() and set itself as
   // |pepper_last_mouse_event_target_|.
   pepper_last_mouse_event_target_ = nullptr;
 #endif
 }
 
 }  // namespace content